Answer:
// C code
// This code will compute the values of the sales ticket sales for concerts
#include <stdio.h>
#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\n",
"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\n", 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
// ***** totalSales ****
void totalSales()
{
float tsales;
for(int i = 0; i <= MAXC; i++){
tsales += sales [i];
}
printf("\n\t\tThe total sales are: $%.2f\n",tsales);
}
// ***********************************
void switchRows (int m, int n) {
char tc;
int ti;
float v;
// printf ("Switching %d with %d\n", 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
//**********sort by fans*************
int minFans (int b) {
float min = fans [b][0];
int target = b;
for (int i = b; i < count; i++)
if (fans [i][0] < min) {
min = fans [i][0];
target = i;
} // end new max found
return target;
}
void sortByFans () {
int target = 0;
//int result;
for (int i = 0; i < count; i++) {
target = minFans(i);
if (target > i)
//result = target;
switchRows (i,target);
}
}
//********************************
void getData () {
// for (int i = 0; i < MAXG; i++) sales [i] = 0;
printf ("\nEnter 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\n", MAXC);
printf (" . to finish entries:\n");
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 ("\n --- Sorted sales ---\n");
sortBySales ();
printArray ();
totalSales ();
printf("--- sorted by fans ---\n");
sortByFans ();
printArray ();
totalSales ();
printf("\t\t ... Bye ...\n");
return 0;
}
