Can you say where is a problem. It's a calculator

Question

#include <iostream>
using namespace std;
float calc(int a, float c, float d){
switch(a) {
case'+':
cout << c+d;
break;
case'-':
cout << c-d;
break;
case'*':
cout << c*d;
break;
case'/':
cout << c/d;
break;
}
}
void main() {
cout << "Enter arithmetical action-,+,*,/";
float x,y;
char o;
cout << "Enter action";
cin << o:
cin << x;
cin << y;

calc(o,x,y);
}

Answer 1

put whitespace after case before quote.