// C code // This code will compute the values of the sales ticket sales for concerts // and sort the entries by those values // Developer: Faculty CMIS102 // Date: Jan 31, XXXX #include  #define MAXN 100 // max characters in a group/concert name #define MAXG 50 // max concerts/groups #define MAXC 3 // max categories char group [MAXG][MAXN]; int fans [MAXG][MAXC]; float prices [MAXC]; float sales [MAXG]; int count = 0; void printArray () { printf ("%15s%5s%5s%5s%10s ", "Concert", "s1", "s2", "s3", "Sales"); for (int i = 0; i < count; i++) { printf ("%15s", group [i]); for (int j = 0; j < MAXC; j++) { printf ("%5d", fans[i][j]); } // end for each category printf ("%10.2f ", sales [i]); } // end for each group } // end function printArray void computeSales () { for (int i = 0; i < count; i++) { sales [i] = 0; for (int j = 0; j < MAXC; j++) { sales [i] += prices [j] * fans [i][j]; } // end for each category } // end for each group } // end function computeSales void switchRows (int m, int n) { char tc; int ti; float v; // printf ("Switching %d with %d ", m, n); for (int i = 0; i < MAXN; i++) { tc = group [m][i]; group [m][i] = group [n][i]; group [n][i] = tc; } // end for each character in a group name for (int i = 0; i < MAXC; i++) { ti = fans [m][i]; fans [m][i] = fans [n][i]; fans [n][i] = ti; } // end for each fan category v = sales [m]; sales [m] = sales [n]; sales [n] = v; } // end switch int findMinSales (int m) { float min = sales [m]; int target = m; for (int i = m+1; i < count; i++) if (sales [i] < min) { min = sales [i]; target = i; } // end new max found return target; } // end function findMinSales void sortBySales () { int target; for (int i = 0; i < count; i++) { target = findMinSales (i); if (target > i) switchRows (i, target); } // for each concert } // end function sortBySales void getData () { // for (int i = 0; i < MAXG; i++) sales [i] = 0; printf ("Enter ticket prices in each of %d cateogories: ", MAXC); for (int i = 0; i < MAXC; i++) scanf ("%f", &prices [i]); printf ("-- Enter group and fans in %d categories ", MAXC); printf (" . to finish entries: "); for (int i = 0; i < MAXG; i++) { scanf ("%s", &group[i]); if (group [i][0] == '.') break; count++; for (int j = 0; j < MAXC; j++) scanf ("%d", &fans[i][j]); } // end for each group } // end function getData int main(void) { getData (); computeSales (); printArray (); printf (" --- Sorted --- "); sortBySales (); printArray (); printf("... bye ... "); return 0; } 

What changes should be made to the code if the customer wished to sort on the number of fans in category 1, the first of the three (or four) categories? Make those changes, test your code and confirm that it is working correctly.

Try using different inputs: a. What changes would you suggest to handle larger, more realistic numbers? b. What happens if any of the numbers, such as the ticket prices, are negative? c. What are your recommendations concerning negative input values?