#include <stdio.h> #include <string.h> char *strrev(char *str) { char *p1, *p2; if (! str || ! *str) return str; for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2) { *p1 ^= *p2; *p2 ^= *p1; *p1 ^= *p2; } return str; } int main() { char arr[100]; printf("Enter a string to reverse\n"); gets(arr); strrev(arr); printf("Reverse of entered string is \n%s\n",arr); return 0; }
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