strlen.c File Reference

Program to calculate length of string. More...

#include <assert.h>
#include <string.h>

Include dependency graph for strlen.c:

Functions
int	length (const char *str)
	Returns the length of string. More...
static void	test ()
	Test function. More...
int	main ()
	Driver Code. More...

Detailed Description

Program to calculate length of string.

Author

Du Yuanchao

Function Documentation

length()

int length

(

const char *

str

)

Returns the length of string.

Parameters

str	the pointer of string.

Returns

the length of string.

{
    int count = 0;
    for (int i = 0; *(str + i) != '\0'; ++i)
    {
        count++;
    }
    return count;
}

main()

int main

(

void

)

Driver Code.

Returns

0 on exit

{
    test();
    return 0;
}

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test()

static void test ( void  )

static

Test function.

Returns

void

{
    assert(length("") == strlen(""));
    assert(length(("a")) == strlen("a"));
    assert(length("abc") == strlen("abc"));
    assert(length("abc123def") == strlen("abc123def"));
    assert(length("abc\0def") == strlen("abc\0def"));
}

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