Question

求大佬帮忙解一下这题

Answer 1

#include <stdio.h>

#include <string.h>

void OECheck(char s[]) {

  int a[2] = {0};

  char *p = s;

  while (*p) a[*p++ -'0']++;

  *p = a[1] % 2 == 0 ? '0' : '1';

}

void main() {

  char s[50]="";

  scanf("%s",s);

  OECheck(s);

  printf("%s",s);

}