6.2 函数的调用

/定义

int add(int numl, int num2){ // num1,num2称为形式参数，简称形参
    int sum = num1 + num2;
    return sum;
}

int main() {
    int a = 10,   int b = 10;
    int sum = add (a，b);//调用时的a，b称为实际参数，简称实参
    cout << "sum = " << sum << endl;
}