Perfect numbers between 1 and 1000

Question

I don't understand why this program doesn't give any output. I just can't see the bug. This is a program to find every perfect number between 1 and 1000. Please help me find the bug. Thanks.

#include <stdio.h>

int main(){
    int number=1, i, sum=0;

    while(number<=1000){

        for(i=1; i<number; i++){
            if(number%i==0){
                sum+=i;
            }
        }

        if(sum==number){
            printf("%d is perfect\n", numero);
        }
        number++;
    }

    return 0;   
}

Answer 1

As already said, you have to reset the sum to zero at the beginning of the loop.
You also have to replace numero with number (typo).
And to go further, I suggest you to use a for loop instead the while loop, which I find more readable IMHO. The inner for loop can also stop when i <= number/2 to optimize a bit. Here is my suggestion of code:

#include <stdio.h>

int main(){

    int sum;

    for(int number = 1;number <= 1000; number++){
        sum = 0;

        for (int i = 1; i <= number/2; i++){
            if (number % i == 0){
                sum += i;
            }
        }

        if (sum == number){
            printf("%d is perfect\n", number);
        }
    }

    return 0;
}

Output:

6 is perfect
28 is perfect
496 is perfect