A short example of doing an in place string reverse in C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void swap(char *a, char *b) {
char tmp = *a;
*a = *b;
*b = tmp;
}
int main(int argc, char **argv) {
if (argc < 2) {
printf("Usage: %s <string>\n", argv[0]);
exit(EXIT_FAILURE);
}
char *tmp = strdup(argv[1]);
int len = strlen(tmp);
int i = 0;
for(i=0;i<len/2;i++) {
swap(&tmp[i], &tmp[len - i - 1]);
}
printf("%s\n", tmp);
free(tmp);
return EXIT_SUCCESS;
}
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Last Modified: 12 December 2016
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