just simple question where that values come :P

Question

i write calculator for int and double on template... i was think its get any off variabels and i try add char and int ( not only add :P ) and my question its how its calculate.
Code :
#include <iostream>
using namespace std;

template <class Cal1 , class Cal2>
Cal1 sum(Cal1 a, Cal2 b) {
return a+b;
}
template <class Cal1 , class Cal2>
Cal1 sub(Cal1 a, Cal2 b){
return a-b;
}
template <class Cal1 , class Cal2>
Cal1 sub1(Cal1 a, Cal2 b){
return b-a;
}
template <class Cal1 , class Cal2>
Cal1 mul(Cal1 a, Cal2 b){
return a*b;
}
template <class Cal1 , class Cal2>
Cal1 divi(Cal1 a, Cal2 b){

if ( b != 0){

return a/b;
}
else {
cout << "Error division by ";
}
return 0;
}
template <class Cal1 , class Cal2>
Cal1 divi1(Cal1 a, Cal2 b){

if ( b != 0){

return b/a;
}
else {
cout << "Error division by ";
}
return 0;
}

int main() {
char x='1';
int y=2.0;
if (sizeof(x)>=8){
cout << "calculating for double:" << endl;
cout << sum(x,y) << endl << sub(x,y) << endl;
cout << mul(x,y) << endl;
cout << divi(x,y)<< endl;}
else{
cout << "calculating for double:" << endl;
cout << sum(y,x) << endl << sub1(y,x) << endl;
cout << mul(y,x) << endl;
cout << divi1(y,x)<< endl;}

return 0;

}
and output:

calculating for double: 51 47 98 24

Answer 1

but i dont use the same Type. at start i add double and int..
for fun i change double for char and is Wonder where from is that output

Answer 2

oww now i understood :) i try add double and int witchout template... i was thinking it is two diffrence Type but bouth are Digital. i just learning ;)

Answer 3

Why did you use Cal2 for the second parameter? Use Cal1 if you mean the same type.