TP_7_C/exo3-base.c

   1 #include <stdio.h>
   2
   3 int stringLength(const char* str) {
   4     int result = 0;
   5
   6     while (str[result] != '\0') {
   7         ++result;
   8     }
   9
  10     return result;
  11 }
  12
  13 void swap(char* v1, char* v2) {
  14     char temp = *v1;
  15     *v1 = *v2;
  16     *v2 = temp;
  17 }
  18
  19 void reverseString(char* str) {
  20     int length = stringLength(str);
  21     int halfLength = length / 2;
  22
  23     for (int charId = 0; charId < halfLength; ++charId) {
  24         swap(&str[charId], &str[length - charId - 1]);
  25     }
  26 }
  27
  28 int main() {
  29     char msg[] = "Votre message";
  30     printf("Initial value: \"%s\"\n", msg);
  31     reverseString(msg);
  32     printf("Reversed     : \"%s\"\n", msg);
  33 }