Warning signs c++

Vote count:

-5

#include<iostream>
#include<string>
#include<ctime>
#include<cstdlib>
#include<fstream>
#include<iterator>
#include<iomanip>
#include<thread>
#include<cctype>
#include<vector>

using namespace std;

int primeNum(int numToPrime)
{
    int count = 0;
    for (int j = 1; j <= numToPrime; j++)
    {
        if (numToPrime % j == 0)
            count++;
    }

    if (count == 2)
        return numToPrime;
}

int main(int argc, char* argv[])
{
    int someNum = 0;
    int primeFac;

    cout << "Please enter a number to get its prime factors: ";
    cin >> primeFac;

    int anotherTemp = primeFac;

    cout << "Prime factorization of\n";
    cout << anotherTemp << " = ";

    if (primeFac == primeNum(primeFac))
        cout << "1 * " << primeFac << endl;
    else
    {
        for (int menNou = 2; menNou < anotherTemp; menNou++)
        {
            int countIt = 0;
            while (primeFac % menNou == 0)
            {
                countIt++;
                someNum = primeFac / menNou;
                primeFac = someNum;
            }

            if (countIt != 0)
            {
                    if (countIt == 1)
                        {
                            cout << menNou;
                            if (primeFac != 1)
                            cout << " * ";
                        }
                    else
                        {
                            cout << menNou << "^" << countIt;
                            if (primeFac != 1)
                                cout << " * ";
                        }   
            }
            countIt = 0;
        }
    }
    cout << endl;
    return 0;
}

OUTPUT Please enter a number to get its prime factors: 1960 Prime factorization of 1960 = 2^3 * 5 * 7^2 Press any key to continue . . .

warning C4715: 'primeNum' : not all control paths return a value at compiling time, why is this? The program works fine but the warning scares me, please help....

asked 2 mins ago

user2957078

1

1 Answer

Vote count:

0

You are getting this error because if count != 2, then you never hit a return statement in your primeNum function.

answered 13 secs ago

ResidentBiscuit

324