Simple C Help?

It says that `num' undeclared (first use this function)

 

#include <stdio.h>
#include <conio.h>


int main()
{
int num1;
int num2;
int num3;
int num4;
printf("Enter 4 numbers");
scanf("%d%d%d%d", &num1, &num2, &num3, &num4);

if(num1 + num2 == num3 + [COLOR="#FF0000"]num4[/COLOR]){
printf("they are equal");
}

if(num1 + num2 != num3+ num4){
printf("they are not equal");
}

getch();
}

Code (markup):

Hey
It was space problem like this: num 4