diff --git a/misc/mirror b/misc/mirror new file mode 100644 index 00000000..6db82a80 --- /dev/null +++ b/misc/mirror @@ -0,0 +1,57 @@ +#include +#include // we include the library string.h to the use of string + +void saisie (char *cpointeur); // Prototypes of the three functions used in the program +int compte (char *s); +char* miroir (char * s); + +int main (int argc , char *argv[]) +{ +char chaine[20]; +saisie(chaine); +printf("miroir est %s",miroir(chaine)); + +} +// this function is used to put a string +void saisie (char *cpointeur) +{ + printf("saisir une chaine\n"); + scanf("%s",cpointeur); +} +/* the function miroir (in french ) it means "mirror" , the major idea is to permute the first caractere with the last using an auxilary +variable (aux) the the 2nd character with the penultimate one and so on . +we made a call to the function (compte) which counts the length of the string . As you can see clearly , I substruct 1 from the equation +k = compte(s)-1 ; to get rid of the EOF caractere which is '\0' because it is not a caractere from the string typed */ +char* miroir (char *s) +{ +int i ; +char aux ; +int k ; +k = compte(s)-1 ; +i = 0 ; +while(i<=k) +{ +aux = s[i]; +s[i]=s[k]; +s[k]=aux ; +k-- ; +i++ ; +} + +return s ; +} + +// compte plays the role of strlen so we can change it by an strlen function if you want that +int compte (char *s) +{ + char *p ; + int k ; + p=s ; + k=0 ; + while(*p!='\0') + { + p++ ; + k++ ; + } + return k ; +}