自动 (函数范围) 变量Automatic (function scope) variables

在函数内声明的变量只能在该函数的范围内使用。A variable declared within a function can only be used within the scope of that function.

// LNK2019_AV.cpp
// compile with: /c
void test(void);

static int lnktest3 = 3;
int lnktest4 = 4;

int main() {
   static int lnktest1 = 1;
   int lnktest2 = 2;
   test();
}

然后and then,

// LNK2019_AV_2.cpp
// compile with: LNK2019_AV.cpp
// LNK2019 expected
extern int lnktest1;
extern int lnktest2;
extern int lnktest3;
extern int lnktest4;

void test(void) {
   int i = 0;
   i = lnktest1;
   i = lnktest2;
   i = lnktest3;
   i = lnktest4;   // OK
}

请参阅See also

链接器工具错误 LNK2019Linker tools error LNK2019