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< p > Program to print the nth term of the Fibonacci series.
< a href = "#details" > More...< / a > < / p >
< div class = "textblock" > < code > #include < assert.h> < / code > < br / >
< code > #include < errno.h> < / code > < br / >
< code > #include < stdio.h> < / code > < br / >
< code > #include < stdlib.h> < / code > < br / >
< code > #include < time.h> < / code > < br / >
< / div > < div class = "textblock" > < div class = "dynheader" >
Include dependency graph for fibonacci.c:< / div >
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2023-04-21 04:02:35 +08:00
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< / div > < table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a id = "func-members" name = "func-members" > < / a >
Functions< / h2 > < / td > < / tr >
< tr class = "memitem:ae082919377416805160894716b2344d7" > < td class = "memItemLeft" align = "right" valign = "top" > unsigned int  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (int number)< / td > < / tr >
< tr class = "memdesc:ae082919377416805160894716b2344d7" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > for assert() for errno - to determine whether there is an error while using strtol() < br / > < / td > < / tr >
< tr class = "separator:ae082919377416805160894716b2344d7" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:aeb1b48abe7f99ab8e1d71426f28ab025" > < td class = "memItemLeft" align = "right" valign = "top" > int  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d0/d6f/fibonacci_8c.html#aeb1b48abe7f99ab8e1d71426f28ab025" > getInput< / a > (void)< / td > < / tr >
< tr class = "memdesc:aeb1b48abe7f99ab8e1d71426f28ab025" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Get the input from the user. < br / > < / td > < / tr >
< tr class = "separator:aeb1b48abe7f99ab8e1d71426f28ab025" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:aa8dca7b867074164d5f45b0f3851269d" > < td class = "memItemLeft" align = "right" valign = "top" > static void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d0/d6f/fibonacci_8c.html#aa8dca7b867074164d5f45b0f3851269d" > test< / a > ()< / td > < / tr >
< tr class = "memdesc:aa8dca7b867074164d5f45b0f3851269d" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > self-test implementation < br / > < / td > < / tr >
< tr class = "separator:aa8dca7b867074164d5f45b0f3851269d" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ae66f6b31b5ad750f1fe042a706a4e3d4" > < td class = "memItemLeft" align = "right" valign = "top" > int  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d0/d6f/fibonacci_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4" > main< / a > ()< / td > < / tr >
< tr class = "memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Main function. < br / > < / td > < / tr >
< tr class = "separator:ae66f6b31b5ad750f1fe042a706a4e3d4" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table >
< a name = "details" id = "details" > < / a > < h2 class = "groupheader" > Detailed Description< / h2 >
< div class = "textblock" > < p > Program to print the nth term of the Fibonacci series. < / p >
< p > Fibonacci series generally starts from 0 and 1. Every next term in the series is equal to the sum of the two preceding terms. For further info: < a href = "https://en.wikipedia.org/wiki/Fibonacci_sequence" > https://en.wikipedia.org/wiki/Fibonacci_sequence< / a > < / p >
< dl class = "section author" > < dt > Author< / dt > < dd > < a href = "https://github.com/IKuuhakuI" target = "_blank" > Luiz Carlos Aguiar C< / a > < / dd >
< dd >
< a href = "https://github.com/niranjank2022" target = "_blank" > Niranjan< / a > < / dd > < / dl >
< / div > < h2 class = "groupheader" > Function Documentation< / h2 >
< a id = "ae082919377416805160894716b2344d7" name = "ae082919377416805160894716b2344d7" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#ae082919377416805160894716b2344d7" > ◆   < / a > < / span > fib()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > unsigned int fib < / td >
< td > (< / td >
< td class = "paramtype" > int  < / td >
< td class = "paramname" > < em > number< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > for assert() for errno - to determine whether there is an error while using strtol() < / p >
< p > for input, output for exit() - to exit the program to calculate time taken by < a class = "el" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" title = "for assert() for errno - to determine whether there is an error while using strtol()" > fib()< / a > < / p >
< p > Determines the nth Fibonacci term < / p > < dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > number< / td > < td > - n in "nth term" and it can't be negative as well as zero < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > nth term in unsigned type < / dd > < / dl >
< dl class = "section warning" > < dt > Warning< / dt > < dd > Only till 47th and 48th fibonacci element can be stored in < code > int< / code > and < code > unsigned int< / code > respectively (takes more than 20 seconds to print) < / dd > < / dl >
< div class = "fragment" > < div class = "line" > < span class = "lineno" > 27< / span > {< / div >
< div class = "line" > < span class = "lineno" > 28< / span > < span class = "comment" > // Check for negative integers< / span > < / div >
< div class = "line" > < span class = "lineno" > 29< / span > < span class = "keywordflow" > if< / span > (number < = 0)< / div >
< div class = "line" > < span class = "lineno" > 30< / span > {< / div >
< div class = "line" > < span class = "lineno" > 31< / span > fprintf(stderr, < span class = "stringliteral" > " Illegal Argument Is Passed!\n" < / span > );< / div >
< div class = "line" > < span class = "lineno" > 32< / span > exit(EXIT_FAILURE);< / div >
< div class = "line" > < span class = "lineno" > 33< / span > }< / div >
< div class = "line" > < span class = "lineno" > 34< / span > < / div >
< div class = "line" > < span class = "lineno" > 35< / span > < span class = "comment" > // Base conditions< / span > < / div >
< div class = "line" > < span class = "lineno" > 36< / span > < span class = "keywordflow" > if< / span > (number == 1)< / div >
< div class = "line" > < span class = "lineno" > 37< / span > < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < span class = "lineno" > 38< / span > < / div >
< div class = "line" > < span class = "lineno" > 39< / span > < span class = "keywordflow" > if< / span > (number == 2)< / div >
< div class = "line" > < span class = "lineno" > 40< / span > < span class = "keywordflow" > return< / span > 1;< / div >
< div class = "line" > < span class = "lineno" > 41< / span > < / div >
< div class = "line" > < span class = "lineno" > 42< / span > < span class = "comment" > // Recursive call to the function< / span > < / div >
< div class = "line" > < span class = "lineno" > 43< / span > < span class = "keywordflow" > return< / span > < a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (number - 1) + < a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (number - 2);< / div >
< div class = "line" > < span class = "lineno" > 44< / span > }< / div >
< div class = "ttc" id = "afibonacci_8c_html_ae082919377416805160894716b2344d7" > < div class = "ttname" > < a href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > < / div > < div class = "ttdeci" > unsigned int fib(int number)< / div > < div class = "ttdoc" > for assert() for errno - to determine whether there is an error while using strtol()< / div > < div class = "ttdef" > < b > Definition:< / b > fibonacci.c:26< / div > < / div >
< / div > <!-- fragment --> < div class = "dynheader" >
Here is the call graph for this function:< / div >
< div class = "dyncontent" >
< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d0/d6f/fibonacci_8c_ae082919377416805160894716b2344d7_cgraph.svg" width = "50" height = "60" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe >
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< / div >
< / div >
< / div >
< a id = "aeb1b48abe7f99ab8e1d71426f28ab025" name = "aeb1b48abe7f99ab8e1d71426f28ab025" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#aeb1b48abe7f99ab8e1d71426f28ab025" > ◆   < / a > < / span > getInput()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > int getInput < / td >
< td > (< / td >
< td class = "paramtype" > void  < / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Get the input from the user. < / p >
< dl class = "section return" > < dt > Returns< / dt > < dd > valid argument to the fibonacci function < / dd > < / dl >
< div class = "fragment" > < div class = "line" > < span class = "lineno" > 51< / span > {< / div >
< div class = "line" > < span class = "lineno" > 52< / span > < span class = "keywordtype" > int< / span > num, excess_len;< / div >
< div class = "line" > < span class = "lineno" > 53< / span > < span class = "keywordtype" > char< / span > < a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > [3], *endPtr;< / div >
< div class = "line" > < span class = "lineno" > 54< / span > < / div >
< div class = "line" > < span class = "lineno" > 55< / span > < span class = "keywordflow" > while< / span > (1)< / div >
< div class = "line" > < span class = "lineno" > 56< / span > { < span class = "comment" > // Repeat until a valid number is entered< / span > < / div >
< div class = "line" > < span class = "lineno" > 57< / span > printf(< span class = "stringliteral" > " Please enter a valid number:" < / span > );< / div >
< div class = "line" > < span class = "lineno" > 58< / span > fgets(< a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > , 3, stdin); < span class = "comment" > // Inputs the value from user< / span > < / div >
< div class = "line" > < span class = "lineno" > 59< / span > < / div >
< div class = "line" > < span class = "lineno" > 60< / span > excess_len = 0;< / div >
< div class = "line" > < span class = "lineno" > 61< / span > < span class = "keywordflow" > if< / span > (!(< a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > [0] == < span class = "charliteral" > ' \n' < / span > ||< / div >
< div class = "line" > < span class = "lineno" > 62< / span > < a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > [1] == < span class = "charliteral" > ' \n' < / span > ||< / div >
< div class = "line" > < span class = "lineno" > 63< / span > < a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > [2] == < span class = "charliteral" > ' \n' < / span > )) {< / div >
< div class = "line" > < span class = "lineno" > 64< / span > < span class = "keywordflow" > while< / span > (getchar() != < span class = "charliteral" > ' \n' < / span > ) excess_len++;< / div >
< div class = "line" > < span class = "lineno" > 65< / span > }< / div >
< div class = "line" > < span class = "lineno" > 66< / span > < / div >
< div class = "line" > < span class = "lineno" > 67< / span > num = strtol(< a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > , & endPtr,< / div >
< div class = "line" > < span class = "lineno" > 68< / span > 10); < span class = "comment" > // Attempts to convert the string to integer< / span > < / div >
< div class = "line" > < span class = "lineno" > 69< / span > < / div >
< div class = "line" > < span class = "lineno" > 70< / span > < span class = "comment" > // Checking the input< / span > < / div >
< div class = "line" > < span class = "lineno" > 71< / span > < span class = "keywordflow" > if< / span > ( < span class = "comment" > // The number is too large< / span > < / div >
< div class = "line" > < span class = "lineno" > 72< / span > (excess_len > 0 || num > 48) ||< / div >
< div class = "line" > < span class = "lineno" > 73< / span > < span class = "comment" > // Characters other than digits are included in the input< / span > < / div >
< div class = "line" > < span class = "lineno" > 74< / span > (*endPtr != < span class = "charliteral" > ' \0' < / span > & & *endPtr != < span class = "charliteral" > ' \n' < / span > ) ||< / div >
< div class = "line" > < span class = "lineno" > 75< / span > < span class = "comment" > // No characters are entered< / span > < / div >
< div class = "line" > < span class = "lineno" > 76< / span > endPtr == < a class = "code hl_struct" href = "../../dd/da2/structbuffer.html" > buffer< / a > )< / div >
< div class = "line" > < span class = "lineno" > 77< / span > {< / div >
< div class = "line" > < span class = "lineno" > 78< / span > < span class = "keywordflow" > continue< / span > ;< / div >
< div class = "line" > < span class = "lineno" > 79< / span > }< / div >
< div class = "line" > < span class = "lineno" > 80< / span > < / div >
< div class = "line" > < span class = "lineno" > 81< / span > < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < span class = "lineno" > 82< / span > }< / div >
< div class = "line" > < span class = "lineno" > 83< / span > < / div >
< div class = "line" > < span class = "lineno" > 84< / span > printf(< span class = "stringliteral" > " \nEntered digit: %d (it might take sometime)\n" < / span > , num);< / div >
< div class = "line" > < span class = "lineno" > 85< / span > < span class = "keywordflow" > return< / span > num;< / div >
< div class = "line" > < span class = "lineno" > 86< / span > }< / div >
< div class = "ttc" id = "astructbuffer_html" > < div class = "ttname" > < a href = "../../dd/da2/structbuffer.html" > buffer< / a > < / div > < div class = "ttdoc" > struct used to store character in certain times< / div > < div class = "ttdef" > < b > Definition:< / b > min_printf.h:31< / div > < / div >
< / div > <!-- fragment -->
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< / div >
< a id = "ae66f6b31b5ad750f1fe042a706a4e3d4" name = "ae66f6b31b5ad750f1fe042a706a4e3d4" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#ae66f6b31b5ad750f1fe042a706a4e3d4" > ◆   < / a > < / span > main()< / h2 >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > int main < / td >
< td > (< / td >
< td class = "paramtype" > void  < / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Main function. < / p >
< dl class = "section return" > < dt > Returns< / dt > < dd > 0 on exit < / dd > < / dl >
< div class = "fragment" > < div class = "line" > < span class = "lineno" > 104< / span > {< / div >
< div class = "line" > < span class = "lineno" > 105< / span > < span class = "comment" > // Performing the test< / span > < / div >
< div class = "line" > < span class = "lineno" > 106< / span > < a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#aa8dca7b867074164d5f45b0f3851269d" > test< / a > ();< / div >
< div class = "line" > < span class = "lineno" > 107< / span > printf(< span class = "stringliteral" > " Tests passed...\n" < / span > );< / div >
< div class = "line" > < span class = "lineno" > 108< / span > < / div >
< div class = "line" > < span class = "lineno" > 109< / span > < span class = "comment" > // Getting n< / span > < / div >
< div class = "line" > < span class = "lineno" > 110< / span > printf(< / div >
< div class = "line" > < span class = "lineno" > 111< / span > < span class = "stringliteral" > " Enter n to find nth fibonacci element...\n" < / span > < / div >
< div class = "line" > < span class = "lineno" > 112< / span > < span class = "stringliteral" > " Note: You would be asked to enter input until valid number ( less " < / span > < / div >
< div class = "line" > < span class = "lineno" > 113< / span > < span class = "stringliteral" > " than or equal to 48 ) is entered.\n" < / span > );< / div >
< div class = "line" > < span class = "lineno" > 114< / span > < / div >
< div class = "line" > < span class = "lineno" > 115< / span > < span class = "keywordtype" > int< / span > number = < a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#aeb1b48abe7f99ab8e1d71426f28ab025" > getInput< / a > ();< / div >
< div class = "line" > < span class = "lineno" > 116< / span > clock_t start, end;< / div >
< div class = "line" > < span class = "lineno" > 117< / span > < / div >
< div class = "line" > < span class = "lineno" > 118< / span > start = clock();< / div >
< div class = "line" > < span class = "lineno" > 119< / span > printf(< span class = "stringliteral" > " Fibonacci element %d is %u " < / span > , number, < a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (number));< / div >
< div class = "line" > < span class = "lineno" > 120< / span > end = clock();< / div >
< div class = "line" > < span class = "lineno" > 121< / span > < / div >
< div class = "line" > < span class = "lineno" > 122< / span > printf(< span class = "stringliteral" > " in %.3f seconds.\n" < / span > , ((< span class = "keywordtype" > double< / span > )(end - start)) / CLOCKS_PER_SEC );< / div >
< div class = "line" > < span class = "lineno" > 123< / span > < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < span class = "lineno" > 124< / span > }< / div >
< div class = "ttc" id = "afibonacci_8c_html_aa8dca7b867074164d5f45b0f3851269d" > < div class = "ttname" > < a href = "../../d0/d6f/fibonacci_8c.html#aa8dca7b867074164d5f45b0f3851269d" > test< / a > < / div > < div class = "ttdeci" > static void test()< / div > < div class = "ttdoc" > self-test implementation< / div > < div class = "ttdef" > < b > Definition:< / b > fibonacci.c:92< / div > < / div >
< div class = "ttc" id = "afibonacci_8c_html_aeb1b48abe7f99ab8e1d71426f28ab025" > < div class = "ttname" > < a href = "../../d0/d6f/fibonacci_8c.html#aeb1b48abe7f99ab8e1d71426f28ab025" > getInput< / a > < / div > < div class = "ttdeci" > int getInput(void)< / div > < div class = "ttdoc" > Get the input from the user.< / div > < div class = "ttdef" > < b > Definition:< / b > fibonacci.c:50< / div > < / div >
< / div > <!-- fragment --> < div class = "dynheader" >
Here is the call graph for this function:< / div >
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< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d0/d6f/fibonacci_8c_ae66f6b31b5ad750f1fe042a706a4e3d4_cgraph.svg" width = "263" height = "110" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe >
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< / div >
< / div >
< / div >
< / div >
< a id = "aa8dca7b867074164d5f45b0f3851269d" name = "aa8dca7b867074164d5f45b0f3851269d" > < / a >
< h2 class = "memtitle" > < span class = "permalink" > < a href = "#aa8dca7b867074164d5f45b0f3851269d" > ◆   < / a > < / span > test()< / h2 >
< div class = "memitem" >
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< table class = "mlabels" >
< tr >
< td class = "mlabels-left" >
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< td class = "memname" > static void test < / td >
< td > (< / td >
< td class = "paramtype" > void  < / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
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< span class = "mlabels" > < span class = "mlabel" > static< / span > < / span > < / td >
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< / div > < div class = "memdoc" >
< p > self-test implementation < / p >
< dl class = "section return" > < dt > Returns< / dt > < dd > void < / dd > < / dl >
< div class = "fragment" > < div class = "line" > < span class = "lineno" > 93< / span > {< / div >
< div class = "line" > < span class = "lineno" > 94< / span > assert(< a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (5) == 3);< / div >
< div class = "line" > < span class = "lineno" > 95< / span > assert(< a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (2) == 1);< / div >
< div class = "line" > < span class = "lineno" > 96< / span > assert(< a class = "code hl_function" href = "../../d0/d6f/fibonacci_8c.html#ae082919377416805160894716b2344d7" > fib< / a > (9) == 21);< / div >
< div class = "line" > < span class = "lineno" > 97< / span > }< / div >
< / div > <!-- fragment --> < div class = "dynheader" >
Here is the call graph for this function:< / div >
< div class = "dyncontent" >
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< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d0/d6f/fibonacci_8c_aa8dca7b867074164d5f45b0f3851269d_cgraph.svg" width = "140" height = "60" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe >
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< / div >
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< / div > <!-- contents -->
< / div > <!-- doc - content -->
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< div id = "nav-path" class = "navpath" > <!-- id is needed for treeview function! -->
< ul >
< li class = "navelem" > < a class = "el" href = "../../dir_296d53ceaeaa7e099814a6def439fe8a.html" > math< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../d0/d6f/fibonacci_8c.html" > fibonacci.c< / a > < / li >
< li class = "footer" > Generated by < a href = "https://www.doxygen.org/index.html" > < img class = "footer" src = "../../doxygen.svg" width = "104" height = "31" alt = "doxygen" / > < / a > 1.9.6 < / li >
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