#include <stdio.h> int _strlen(char *str) { int len, i; len = 0; for (i = 0; str[i]; i++) len++; return (len); } void reverse_string(char *str) { int i, j, size; size = _strlen(str); j = 0; for (i = size - 1; i > j; i--) { char temp = str[j]; str[j] = str[i]; str[i] = temp; j++; } } int main(void) { char str[] = "JQK"; reverse_string(str); printf("Reversed string: %s\n", str); return 0; }
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