Thread: A Little Help

Sorry forgot to indent

Enclose your if conditional statement in parentheses. And (line 20) don't forget to put separators between them.

Ok so I finish the first program I now need a little help fixing it so it does what number 2 says...

Here is the finished code...

Code:

#include <stdio.h>
#include <math.h>

 int main(int argc, char* argv[])
{ 
 int a1, a2, a3, a4, a5, m6, m7, f8;
 float Total, a, m, f, fg;
  char Grade;
 printf("Enter Grades: \n");
   scanf("%d%d%d%d%d%d%d%d", &a1, &a2, &a3, &a4, &a5, &m6, &m7, &f8);
  Total=a1+a2+a3+a4+a5+m6+m7+f8;

 a = (a1+a2+a3+a4+a5)*.07;
 m = (m6+m7)*.2;
 f = (f8)*.25;
 fg = a+m+f;


 if (a1<=4 || a2<=4 || a3<=4 || a4<=4 || a5<=4 || m6<=4 || m7<=4 || f8<=4)
   { 
 Grade='F';
   }
 if (Total>=48)
   { 
 Grade='C';
   }
 if (Total>=64)
   { 
 Grade='B';
   }
 if (Total >=70)
   {
 Grade='A';
   }
 
printf("\na1=%d, a2=%d, a3=%d, a4=%d, a5=%d, m6=%d, m7=%d, f8=%d\n", a1, a2, a3, a4, a5, m6, m7, f8);
 printf("\nTotal=%f,Grade is %c\n", fg, Grade);

 return 0;
}

So what equation are you trying to solve here? What f8 value, will give a student a grade point total (fg), that is less than 48 (F)? What f8 will give an fg >=48 and less than 64? What about >=64 and less than 70?

You could find it via the arithmetic, or (much less efficient and less desirable), find it by looping through values, stepping them up until they reach the desired answer. It's a puke algorithm this second way, but it's there.

Concentrating on the first way, what would be the equation?