GPA

#include<stdio.h>
#include<stdlib.h>
int main()
{
     char course1[] = "Physice I";
     int credit1=3,sec1=3;
     char course2[] = "Math I";
     int credit2=3,sec2=5;
     char course3[] = "Chemistry";
     int credit3=3,sec3=5;
     char course4[] = "Intro to Computer Prog";
     int credit4=3,sec4=8;
     char course5[] = "Table Tennis";
     int credit5=1,sec5=04;
     char grade1,grade2,grade3,grade4,grade5;
  printf("Enter grade(A-E) for each cours\n\n");
  printf("Physics I\n",course1);
  printf("grade = ");
  scanf("%c",&grade1);
  fflush(stdin);
  printf("Math I\n",course2);
  printf("grade = ");
  scanf("%c",&grade2);
  fflush(stdin);
  printf("Chemistry\n",course3);
  printf("grade = ");
  scanf("%c",&grade3);
  fflush(stdin);
  printf("Intro to Computer Prog\n",course4);
  printf("grade = ");
  scanf("%c",&grade4);
  fflush(stdin);
  printf("Table Tennis\n",course5);
  printf("grade = ");
  scanf("%c",&grade5);
  fflush(stdin);
  printf("\n\n   GRADE REPORT\n");
  printf("-----------------------------------------------------------------\n");
  printf("#   Course                 Section       Credit      Grade\n");
  printf("-----------------------------------------------------------------\n");
  printf("1  Physice                   %d            %d           %c\n",sec1,credit1,grade1);
  printf("2  Math I                    %d            %d           %c\n",sec2,credit2,grade2);
  printf("3  Chemistry                 %d            %d           %c\n",sec3,credit3,grade3);
  printf("4  Intro to Computer prog    %d            %d           %c\n",sec4,credit4,grade4);
  printf("5  Table Tennis              %d            %d           %c\n",sec5,credit5,grade5);
  printf("------------------------------------------------------------------\n\n\n");
  float gpa,totalcredits;
  totalcredits = credit1 + credit2 + credit3 + credit4 + credit5;
  gpa =   (credit1*('E'-grade1)+credit2*('E'-grade2)+
          credit3*('E'-grade3)+credit4*('E'-grade4)+
          credit5*('E'-grade5))/totalcredits;

    printf("GPA = %.2f",gpa);
  return 0;
}