Why is this not working for all tests? Could anybody suggest me..this is working for only 1,2,5 tests for paint costs.

Question

#include <stdio.h>
#include<math.h>
int main()
{
int colours,sum,tax;
scanf("%d %d %d",&colours,&sum,&tax);
sum=5*colours+40;
tax=sum/10;
sum=sum+tax;
printf ("%d",sum);
return 0;
}

Answer 1

Since sum is int, and 10 is int, you get result of sum/10 as integer only, you miss fraction part so 1 of them should double of float.. So take as double or use 10.0..
Now take color as double,. Only one input is given so scanf("%lf", @color); is enough.. To store fraction part in tax, it should double or float.. The result in total sum should rounded up means ex: 10.4 to 11.0,.. Or 7.9 to 8.0.
And finally print result as integer...