//test.cpp #include <iostream> using namespace std; extern int val; int main() { cout<<"val:"<<val<<endl; return 0; } //file1.cpp int val = 10; //file2.cpp int val = 20;
编译错误
//test.cpp #include <iostream> using namespace std; extern int val; int main() { cout<<"val:"<<val<<endl; return 0; } //file1.cpp int val = 10; //file2.cpp int val = 20;
编译错误
原文：https://www.cnblogs.com/ingy0923/p/8671885.html