Can you tell me what is wrong with this code?

[misslyss]

thanks everyone! this problem has been solved

[manutd636]

What does it output instead or what errors are you getting?

[JayhawkZombie]

	do {
		cout << "How many prime numbers do you want?  ";
		cin >> input;
	} while(input < 0);

this will loop forever until the user enters a negative number. I'm assuming that's probably not what you want.

My mistake. It's fine. I wrote that at midnight, after being up for 20 hours.

[misslyss]

it outputs nothing. it's literally blank when i try to input something. style-wise is it ok? is that do-while loop the only issue?

[shadowCODE]

This is my output, and it is what i expected. Is it not what you want??

jafar@shadow:~/Desktop$ ./test
How many prime numbers do you want?  7
1:  2
2:  3
3:  5
4:  7
5:  11
6:  13
7:  17
jafar@shadow:~/Desktop$ 

[PCrumley48]

	do {
		cout << "How many prime numbers do you want?  ";
		cin >> input;
	} while(input < 0);

this will loop forever until the user enters a negative number. I'm assuming that's probably not what you want.

Better look again. . .it will continue to loop as long as input is negative.

[misslyss]

The program is supposed to read a value between 1 and 5000 -called N. The program should then print out the first N prime numbers

[shadowCODE]

It seems you dont know what you want.

[dhayden]

I agree with shadowCODE. It looks to me like the code is working correctly. In his example he asked for 7 prime numbers and it printed out 7 prime numbers. If this is wrong then please explain what output you expect when the input is 7.

[jasonwynn10]

#include <iostream>
using namespace std;

int getInput() {

	int input;
		cout << "How many prime numbers do you want?  ";
		cin >> input;
	return input;

}

bool isPrime(int x) {

	for (int i = 2; i <= x/2; i++) {
		if (x % i == 0) {
			return false;
		}
	}
	return true;
}

int main() {

	int N = getInput();
	int count = 1;
	int num = 2;

    if(N<=0)
    {
    N=N*-1;
    while (count <= N) {
		if (isPrime(num)) {
			cout << count << ": -" << num << endl;
			count++;}num++;}
    }else{
	while (count <= N) {
		if (isPrime(num)) {
			cout << count << ":  " << num << endl;
			count++;}num++;}}
return 0;}

[misslyss]

thanks everyone!

[wildblue]

Please don't erase your post after people help you :)