why this program is not running what the problem with the code i need help

Question

#include <iostream>

using namespace std;

int main ()

{

int num = 0;

int sum=0;

cout << "Enter a number ";

cin >> num;

while(num<0)

cout<<"please enter a positive integer";

cin>>num;

}

for(int i = 1; i<=num; i++)

{

sum+=i;

}

cout<<"the total sum is"<<sum<<endl;

}

return 0;

Answer 1

#include <iostream>

using namespace std;

int main ()

{

int num = 0;

int sum=0;

cout << "Enter a number ";

cin >> num;

while(num<0){

cout<<"please enter a positive integer";

cin>>num;

}

for(int i = 1; i<=num; i++)

{

sum+=i;

}

cout<<"the total sum is"<<sum<<endl;

return 0;

}