c++単純な加減乗算器
877 ワード
#include
using namespace std;
int main()
{
double a,b;
char op;
cout << "enter a" << endl;
cin >> a;
cout << "enter operator" << endl;
cin >> op;
cout << "enter b" << endl;
cin >> b;
double result;
if (op=='+')
{
result = a + b;
}
else if (op=='-')
{
result = a-b;
}
else if (op=='*')
{
result = a*b;
}
else if (op=='/'){
if (b==0){
cout << "cannot devided by 0
";
return 0;
}
else{
result =a/b;
}
}
else
{
cout << "invalid operator
";
return 0;
}
cout << "result is " << result << endl;
return 0;
}