int main()
{
    cout<<"10+20"<<calc(10,20,+);
     cout<<"10*20"<<calc(10,20,*);
      cout<<"10-20"<<calc(10,20,-);
       cout<<"10/20"<<calc(10,20,/);

}

int calc (int a, int b, char c)
{
 int total=0;
 if(c=='+'){
  total = a+b;
 }else if(c=='*'){
     total = a*b;
 }else if(c=='-'){
     total = a-b;
 }else if(c=='/'){
     total = a/b;
 }
 return total;
}