Question

I’m trying to make a program that finds the largest prime factor of a given value.

If I run ./a.out 55, cout << "Input " << *argv[1]<< endl; returns 5 instead of 55.

When I take out the asterik and check the pointer `value(argv[1]) I get 55. I’m confused why this is happening.

int main(int argc, char *argv[])
{
    if(argc == 2)
    {
        cout << "Input  " << *argv[1]<< endl;
        // cout << "Biggest Prime Factor of 34 is : " << findPrime(number, 0) << endl;
    }
    else
        cout << "Too many inputs:" << endl;
    return 0;
}

Answer 1

Drop the *:

cout << "Input  " << argv[1] << endl;
                    ^ 

It’s because *argv[1] means the first character of argv[1]. You want the entire string instead.