Someone

#include <string.h>#include <stdio.h>int main () {        char string[]="dave rules";        char *start = string;        char *end = string + strlen(string) - 1;        char *sentinel = end + 1;        while (start < end) {                *sentinel = *start;                *start = *end;                *end = *sentinel;                start++;                end--;        }        *sentinel = '\0';        printf("string is now \'%s\'\n",string);}