Write some Software

I need a C program that builds on already existing code: #include<stdio.h> #include<stdlib.h> //Taking the default size is 20 and if required it will be increased or decreased int arraySize = 20; //Taking the input from user and adjusting the arraySize based on number of inputs void checkAndReallocateOnlyUsedLocations(double * arr , int count) { if(count < arraySize) { arr = realloc(arr , count * sizeof(double)); arraySize = count; } } void takeInputGrades(double * arr) { double x = 0; printf("Please enter gradres -1 to end: \n"); int count = 0; while(x != -1.00) { scanf("%lf" , &x); arr[count++] = x; if(count == arraySize) { arraySize *= 2; arr = realloc(arr,arraySize * sizeof(double)); } } checkAndReallocateOnlyUsedLocations(arr,count-1); } //Finding the average double findAvg(double * arr) { int i = 0 ; double sum = 0.0; for(i = 0 ; i < arraySize ; i++) { sum += arr[i]; } return (sum / arraySize); } //Finding the highest double findHighest(double * arr) { double highest = arr[0]; int i = 0 ; for(i = 1; i < arraySize ; i++ ) { if(arr[i] > highest) highest = arr[i]; } return highest; } //Finding the lowest double findLowest(double * arr) { double lowest = arr[0]; int i = 0 ; for(i = 1; i < arraySize ; i++ ) { if(arr[i] < lowest) lowest = arr[i]; } return lowest; } int main() { double * array = (double *) malloc(arraySize * sizeof(double)); takeInputGrades(array); printf("Grades you entered: "); int i = 0 ; for(i = 0 ;i < arraySize ; i++) { printf("\n%.2f\n" , array[i]); } printf("\nAverage grade is : %.2f\n" , findAvg(array)); printf("Highest grade is : %.2f\n" , findHighest(array)); printf("Lowest grade is : %.2f\n" , findLowest(array)); free(array); return 0; } The above code must be modified to use a custom struct to hold student's ID numbers and the percentage score for each item entered into the grade book. The program should accept the entry of ID numbers and percentage grades (0–100) until the user signals that he or she is done entering grades. The program should then print out the ID numbers and grades entered by the user, sorted by ID number.