运行成功，输入错误

#include <stdio.h>

int main()

{

    int x = 100;

    printf("x=%d\n",x++);

    printf("x=%d\n",++x);

    printf("x=%d\n",--x);

    printf("x=%d\n",x);

    printf("x=%d\n",x);

    printf("x=%d\n",--x);

    return 0;

}