Error in the program, it shows no output when i try to run it.

Question

#include <stdio.h>

int main() {
int n;
scanf("%d",n);
int p =5;
int q = 4;
int cost;
if(n%2==0)
{

cost = (n/2)*q;
}
else
{
cost = p+((n-1)/2)*q;
}
printf("%d",cost);

return 0;
}

Answer 1

Should be:

scanf("%d", &n);

not

scanf("%d", n);

Answer 2

Thanks @Phurinat, basics really matter.