윤동주

fuction push

1 +int square(int a); //함수 선언
2 +
3 +int main()
4 +{
5 + int x;
6 + cin >> x;
7 + cout << square(x) << endl; // square 함수 사용
8 +}
9 +
10 +int square(int a) //함수정의
11 +{
12 + return a * a;
13 +}
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