
#ifndef _ATS_TEST_STA_
#define _ATS_TEST_STA_
#include <stdlib.h>
#include <stdio.h> int a; //声明
void f(); #endif
function.c
#include "test.h" void f()
{
printf("a = %d, &a = %p\n", a, &a);
a = ;
printf("a = %d, &a = %p\n", a, &a);
}
main.c
#include <stdlib.h>
#include <stdio.h> #include "test.h" int main()
{
printf("a = %d, &a = %p\n----------------\n", a, &a);
f();
printf("----------------\na = %d, &a = %p\n", a, &a); system("pause");
return ;
}
- 修改头文件test.h为
#ifndef _ATS_TEST_STA_
#define _ATS_TEST_STA_
#include <stdlib.h>
#include <stdio.h> int a = ; //定义
void f(); #endif
编译错误:
fatal error LNK1169: 找到一个或多个多重定义的符号
- 修改头文件test.h为
#ifndef _ATS_TEST_STA_
#define _ATS_TEST_STA_
#include <stdlib.h>
#include <stdio.h> static int a = ; //修改为static
void f(); #endif
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要合适运用变量的声明、定义。
参考资料
1 C语言中的static 详细分析 http://blog.****.net/keyeagle/article/details/6708077