Learn to Program with C_ Learn to Program using the Popular C Programming Language ( PDFDrive )

Chapter 8 ■ Arrays
The following shows how we want the program to work:
Enter up to 100 numbers (end with 0)
2 7 5 3 0
Numbers entered: 4
Sum of numbers: 17
The average is 4.25
Numbers and differences from average
2 -2.25
7 2.75
5 0.75
3 -1.25
Program P8.1 shows how to write the program to work like this.
Program P8.1
//find average and difference from average
#include <stdio.h>
#define MaxNum 100
int main() {
int a, num[MaxNum];
int n = 0;
double sum = 0;
printf("Enter up to %d numbers (end with 0)\n", MaxNum);
scanf("%d", &a);
while (a != 0) {
sum += a;
num[n++] = a; //store in location n, then add 1 to n
scanf("%d", &a);
}
}
if (n == 0) printf("No numbers entered\n");
else {
printf("\nNumbers entered: %d\n", n);
printf("Sum of numbers: %1.0f\n\n", sum);
double average = sum / n;
printf("The average is %3.2f\n", average);
printf("\nNumbers and differences from average\n");
for (int h = 0; h < n; h++)
printf("%4d %6.2f\n", num[h], num[h] - average);
}
204
www.it-ebooks.info