#define _CRT_SECURE_NO_WARNINGS 1 #include<stdio.h> void test(int x){ x = 1000; printf("test 初始化x 为%d\n", x); } int main() { int x = 1024; printf("test 调用前x 为%d\n", x); test(x); printf("test 调用后x 为%d\n", x); return 0; }