This program runs but no matter what I enter it outputs \"Try AgainTry AgainPrim

Question

This program runs but no matter what I enter it outputs "Try AgainTry AgainPrimes:" Then stops working. The instructions are below the code.


Code:


#include <iostream>

#include <cmath>

using namespace std;

// FUNCTION PROTOTYPE FOR read_range

void read_range(int &min_val, int &max_val);

// FUNCTION PROTOTYPE FOR is_prime

double is_prime(int a);

// DO NOT MODIFY THE MAIN ROUTINE IN ANY WAY

int main()

{

int imin(0), imax(0);

// Read in range

read_range(imin, imax);

// Print prime numbers

cout << "Primes:";

for (int k = imin; k <= imax; k++) {

if (is_prime(k))

{

cout << " " << k;

}

}

cout << endl;

return 0;

}

// DEFINE FUNCTION read_range() HERE:

void read_range(int &min_val, int &max_val)

{

cout << "Enter the values: ";

cin >> min_val >> max_val;

if (min_val || max_val < 2)

{

cout << "Try again";

if (min_val > max_val);

{

cout << "Try again";

}

}

else (min_val < max_val);

}

// DEFINE FUNCTION is_prime() HERE:

double is_prime(int a)

{

for (int b = 0; b <= a; b++)

{

if ( a % b == 0)

{

cout << "True";

}

else

{

cout << "False";

}

}

}

Explanation / Answer

#include<stdio.h>

#include <iostream>
#include <cmath>

#include<math.h>


using namespace std;


// FUNCTION PROTOTYPE FOR read_range


void read_range(int &min_val, int &max_val);


// FUNCTION PROTOTYPE FOR is_prime


bool is_prime(int a);//return value shold be bool


// DO NOT MODIFY THE MAIN ROUTINE IN ANY WAY
int main()
{
int imin(0), imax(0);


// Read in range
read_range(imin, imax);


// Print prime numberscout<<imin<<imax;
cout << "Primes:";
for (int k = imin; k <= imax; k++) {
if (is_prime(k))
{
cout << " " << k;
}
}
cout << endl;
system("pause");
return 0;
}


// DEFINE FUNCTION read_range() HERE:


void read_range(int &min_val, int &max_val)
{
cout << "Enter the values: ";
cin >> min_val >> max_val;


if (min_val<2 || max_val<2)
{
cout << "Try again";


if (min_val > max_val);
{
cout << "Try again";
}
}
else (min_val < max_val);


}


// DEFINE FUNCTION is_prime() HERE:

bool is_prime(int num)

{ if(num == 0) return true;

num = abs(num);

for(int i = 2; i <= sqrt(num); i++)

if(num % i == 0) return false;

return true; }

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