#include <iostream>

using namespace std;

int main()

{

char operation;

string choice;

int ans1;

cout<<"What is the answer of (2A+B)^2 when a=3, b=5? \n1 - 120 \n2 - 121 \n3 - 122 \n4 - 123 \n5 - 124";

cin>>operation;

switch (operation)

{

case '1' :

choice = "120";

break;

case '2' :

choice = "121";

break;

case '3' :

choice = "122";

break;

case '4' :

choice = "123";

break;

default:

choice = "Invaild";

}

cout<<"Your answer is "<<choice<<" ";

{

if (BlahBlah)

ans1=correct;

else

ans1=wrong;

}


cout<<"Your answer is "<<ans1;

return 0;

}




여기에서 2번을 고르면 답이 맞다고 출력하고 2번 외에는 답이 아니라고 출력하고 싶은데 어떻게 해야하나요?