In the Perfect Number Program, when I run the program I enter a number such for example 6 which is a perfect number after I put in the number it says its not a perfect number if I entered a different perfect number like 28, 496, 8128 it still says its not a perfect number. Is there something in my code that prevents from showing the perfect numbers after entering the number?

Code:

#include<stdio.h>
#include<math.h>
int main()
{
int perfect(int c);
int a,b,c,i;
printf("Enter a Number: " );
scanf("%d",&a);c=0;
if(c==a) {
printf("\nA perfect number\n");
}
else
printf("\nNot a perfect Number\n");
return 0;
}
int perfect(int c)
{
int a,b,i;
for(i=1;i<a;i++)
{
b=a%i;
if(b==0)
{
c=c+i;
if(c==a) {
printf("\nA perfect number\n");
}
else
printf("\nNot a perfect Number\n");
}
return 0;
}
}