Need help with program

[neilram27]

i recently started learning c++ and i have been given a question and no one seems to be able to get it in my class. I have to write a piece of programming. the program has to accept 3 positive numbersas inputs and print it out in accending order. if a negative number is inputted it should show a message to re enter a correct number . Any help will be appreciated.

[SamuelAdams]

which part can no one get ?

your sudo code would be
if num1 > num2 & num3
if num2 > num3
num1 num2 num3
else
num1 num3 num2

else
if num2 > num1 & num3
chk if num1 is larger than 3

else
if num3 > num1 & num2
chk if num1 is larger than 2

[neilram27]

but how to apply the code to loop back if a negative number is inputted

[neilram27]

this is what i have so far

#include <iostream>
using namespace std;
int main()

{
int num1;
int num2;
int num3;
int exit;


cout << "Please type the first number and press Enter." << endl;
cin >> num1;
cout << " " << endl;
cout << "Please type the second number and press Enter." << endl;
cin >> num2;
cout << " " << endl;
cout << "Please type the third number and press Enter." << endl;
cin >> num3;
cout << " " << endl;

if (num1<num2 && num2<num3)
cout<< num1 << num2 << num3;
if (num1<num3 && num3<num2)
cout<< num1 << num3 << num2;
if (num2<num1 && num1<num3)
cout<< num2 << num1 << num3;
if (num2<num3 && num3<num1)
cout<< num2 << num3 << num1;
if (num3<num2 && num2<num1)
cout<< num3 << num2 << num1;
if (num3<num1 && num1<num2)
cout<< num3 << num1 << num2;

cout << " " << endl;
cout << "Type 'exit' to exit." << endl;
cin >> exit;

system ("pause");
return 4;

}

...it works i just confused on how to enter a loop to stop negative numbers from entering and it has to show a message also!

[neilram27]

i was thinking to use an if else function but im a bit confused on how to loop it back after the first entry

[neilram27]

can anyone help me

[AbstractionAnon]

Since you have to do the same thing three times, you should put the logic in a function.

#include <iostream>
using namespace std;

//  Does not return until a positive number has been entered; 
int get_positive_integer (int n)
{   int num;

    do
    {   
        cout << "Please enter number " << n << ": "; 
        cin >> num;
    } while (num < 0);
    return num;
}

int main()
{   int num1;
    int num2;
    int num3;

    num1 = get_positive_integer (1);
    num2 = get_positive_integer (2);
    num3 = get_positive_integer (3);

    if (num1<num2 && num2<num3)
        cout<< num1 << num2 << num3;
    if (num1<num3 && num3<num2)
        cout<< num1 << num3 << num2;
    if (num2<num1 && num1<num3)
        cout<< num2 << num1 << num3;
    if (num2<num3 && num3<num1)
        cout<< num2 << num3 << num1;
    if (num3<num2 && num2<num1)
        cout<< num3 << num2 << num1;
    if (num3<num1 && num1<num2)
        cout<< num3 << num1 << num2;

    system ("pause");
    return 0;   //  A successful program should always return 0
}

BTW, you can't enter 'exit' into an int.

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