问如果我在同一个语句中使用前增量和后置增量，会发生什么情况？

EN

#include <stdio.h>

int main(){
    int x, z;

    x = 5;
    z = x++ - 5; // increase the value of x after the statement completed.
    printf("%d\n", z); // So the value here is 0. Simple.

    x = 5;
    z = 5 - ++x; // increase the value of x before the statement completed.
    printf("%d\n", z); // So the value is -1.

    // But, for these lines below..

    x = 5;
    z = x++ - ++x; // **The interesting statement
    printf("%d\n", z); // It prints 0

    return 0;
}