Why the value of C is not changing when i use c=c++; instruction. 
Code
#include <stdio.h>
int main()
{
int t, c=0,d;
scanf("%d",&t);
while(t--)
{
    int n;
    scanf("%d",&n);
    if(n>=50)
    {
        c=c++;
        printf("%d\n",c);
    }
}
    return 0;
}
 
     
    