Array testGrades contains NUM_VALS test scores. Write a for loop that sets sumExtra to the total extra credit received

Question

Array testGrades contains NUM_VALS test scores. Write a for loop that sets sumExtra to the total extra credit received. Full credit is 100, so anything over 100 is extra credit. Ex: If testGrades = {101, 83, 107, 90}, then sumExtra = 8, because 1 + 0 + 7 + 0 is 8.

Please code using C language

#include <stdio.h>

int main(void) {
   const int NUM_VALS = 4;
   int testGrades[NUM_VALS];
   int i;
   int sumExtra = -9999; // Assign sumExtra with 0 before your for loop

   for (i = 0; i < NUM_VALS; ++i) {
      scanf("%d", &(testGrades[i]));
   }

   /* Your solution goes here  */

   printf("sumExtra: %d\n", sumExtra);
   return 0;
}

Answer 1

Write a function:

#include <stdio.h>
                                                               
int calcSumExtra(size_t n, int a[n]) {
    int s = 0;
    for(size_t i = 0; i < n; i++)
        s += (a[i] > 100) * (a[i] - 100);
    return s;
}

int main(void) {
   const int NUM_VALS = 4;
   int testGrades[NUM_VALS];
   int i;
   int sumExtra = -9999; // Assign sumExtra with 0 before your for loop
   for (i = 0; i < NUM_VALS; ++i) {
      scanf("%d", &(testGrades[i]));
   }

   /* Your SOlution goes here */
   sumExtra = calcSumExtra(NUM_VALS, testGrades);

   printf("sumExtra: %d\n", sumExtra);
   return 0;
}