Question

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What is the difference between an int and a long in C++?
difference in long vs int data types in C++

In c++ which is the diference between the int and long data type. Wrote the following code:

int _tmain(int argc, _TCHAR* argv[])
{
    cout<<"Int_Max = "<<INT_MAX<<endl;
    cout<<"Int_Min = "<<INT_MIN<<endl;
    cout<<"Long_Max = "<<LONG_MAX<<endl;
    cout<<"Long_Min = "<<LONG_MIN<<endl;
}

And this were the results…

Int_Max = 2147483647
Int_Min = -2147483648
Long_Max = 2147483647
Long_Min = -2147483648

I’m confused.

Answer 1

According to the standard, int is guaranteed to be at least 16 bits and long is at least 32 bits. On most 32-bit compilers they are just the same, both 32 bits. But you shouldn’t count on this as there are 64-, 16- and even 8-bit compilers too.