Help with warning

//Program for Mastery

#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    int result, result2, result3, result4, result5; //This lists the integers being used in the project.

    /*This is the console input and output to gain the absolute
    value of the integer entered into the console.
    It will display the absolute value after each entered value
    */
    cout << "Enter first value:";
    cin >> result;
    result = abs(result);
    cout << result << "\n";

    cout << "Enter second Value: ";
    cin >> result2;
    result2 = abs(result2);
    cout << result2 << "\n";

    cout << "Enter third value: ";
    cin >> result3;
    result3 = abs(result3);
    cout << result3 << "\n";

    cout << "Enter fourth value: ";
    cin >> result4;
    result4 = abs(result4);
    cout << result4 << "\n";

    cout << "Enter fifth value: ";
    cin >> result5;
    result5 = abs(result5);
    cout << result5 << "\n";

    return 0;
}

int num;
for(int i=0; i<5; i++)
{
    cout<<"Enter number "<<i<<endl;
    cin>>num;
    cout<<"Abs: "<<abs(num)<<endl;
}