#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#define SIZE 9

//* header functions *//
void testvalue(int numtests, double percentages[]);
void grade(int numtests, double percentages[], double score[], double weightedaverage[]);

//* functions *//
//* function that catalogs the value of each test *//
void testvalue(int numtests, double percentages[])
{
          int count;
          double sum = 0;
          for(count = 0; count < numtests; count++){
                    printf("Enter the percentage value of each test\n");
                    scanf("%f", &percentages[count]);
                    printf("This test is worth %4.2f points.\n", percentages[count]);
                    sum += percentages[count];
                    if (sum > 100){
                            printf("percentages were entered in error, please try again\n");
                            sum = 0;
                    }
          }
          return;
}

//* the function that determines the grade value *//
void grade(int numtests, double percentages[], double score[], double weightedavge[])
{
     int count;
     for(count = 0; count < numtests; count++){
               printf("enter the grades you've gotten for each test\n");
               scanf("%d", &score[count]);
               printf("%d\n", grade[count]);
               weightedavge[count] = (grade[count] * percentages[count]);
               }
     return;
}

int main()
{
    int numtests, count, choice;
    double percentages[SIZE], score[SIZE], weightedavge[SIZE];
    
    printf("This program will help answer all your questions about your grade");
    printf("Please enter the number of tests that will be given throughout the semester");
    
    //* acquiring the number of *//
    //* tests taken from the user *//
    scanf("%d", &numtests);
    
    //* as well as gauge the size of the arrays *//
    if (numtests > 0)
       printf("There are %d tests this semester\n", numtests);
    else {
         printf("Invalid number of marks\n");
         exit(1);
    }
    
    //* runs the value function to determine *//
    //* the percentage value of each test *//
    
    testvalue(numtests, percentages[SIZE]);
    printf("If you've never missed a test, type 1, otherwise, type 2");

    //*check to see if the user has ever missed a test*//
    scanf("%d", &choice);
    if (choice == 1){
               grade(numtests, percentages[SIZE], score[SIZE], weightedavge[SIZE]);
               for(count = 0; count < numtests; count++) {
                         printf("%f", weightedavge[count]);
                         }
               }
    return 0;
}