Could anyone tell me why the 1st result is 2 while the 2nd result is 2.5? I mean why the1st one is and integer and the 2nd float

Question

#include <iostream>
using namespace std;

int main()
{
double result=0.0;
double a=0.0;
double b=0.0;
result=5/2;
cout<<"1st result is:"<<result<<endl;
cout<<endl;
a=5;
b=2;
result=a/b;
cout<<"2nd result is:"<<result<<endl;
return 0;
}

Answer 1

This is because the first result is a division two integers, so result is an integer and you lose the remainder.
While for the second result both numbers are floating point numbers​, so the result is floating point and you get 2.5
If the first one was 5.0 / 2.0, then the compiler would treat this as a floating point and would be 2.5 also.