#include<stdio.h>
int main(){
int top;
int divisor=1;
int sum=0;
printf("Enter a positive integer:");
scanf("%d",&top);
while(divisor<top){
if(top%divisor==0){
sum=sum+divisor;
}
divisor++;
}
if(sum==top){
printf("%d is a perfect number.",top);
}
}

#include<stdio.h>
int readValues(){
int a[20];
int i;
scanf ("%d", &a[i]);
}
int main(){
int nums[20];
int i=0;
printf (" Enter some numbers: ");
while (i<=20){;
readValues();
i++;
}
}

#include<stdio.h>
int readValues(){
int a;
scanf ("%d",&a);
}
int printValues(){
int a[20];
int i;
if(a!=20){
printf ("%d'\0'",a);
}
else{
printf ("%d'\n",a);
}
}
int main(){
int nums[20];
int i=0;
printf ("Enter some numbers:");
while (i<=20&&nums[i-1]!='\0'){;
readValues();
i++;
}
printValues();
}