这段代码运行后 应该输入什么啊！？求解！#include<stdio.h>char flag[30];char ciphertext[30];void change(char *flag){ int i; for (i = 0; i < strlen(flag) ;i++) flag[i] = (char)((int)flag[i] + 3);}int main(){ printf("I believe it is simple for you.\n"); printf("input flag:"); scanf("%s", flag); if (strlen(flag) != 21) { printf("Ohhh,your flag is wrong!"); return 0; } strcat(flag, "chenze"); change(flag); strcpy(ciphertext, "iodj~Wk4vb4vbu6y6uv6€fkhq}h"); if (!strcmp(flag,ciphertext)) printf("Ohhhh,you are great!"); else printf("Ohhh,your flag is wrong!"); return 0;