#includeusing namespace std; int main() { int a = 2; a += 1; cout << "a=" << a << endl; //其他都一样,自己看着玩把 system("pause"); return 0; }

#includeusing namespace std; int main() { int a = 2; a += 1; cout << "a=" << a << endl; //其他都一样,自己看着玩把 system("pause"); return 0; }