• short int (2 Bytes) or int (4 bytes) both will hold integers,

#include <iostream.h>
using namespace std;
//variable_8.cpp
int main()
{
short n1, n2 , n3, n4 ;//defined
int x1, x2, x3, x4;
cout <<"please print three numbers : " ;
// initialized with user's input
cin >>n1 >>n2 >>n3 ;
n4 = n1 + n2 + n3;
cout <<"well total is " << n4 << endl;
n3 += n1 + n2 + n3;
cout <<"well n3 was calculated twice " << n3;
return 0;
}