In this example, you
will learn to calculate the average of n number of elements entered by the user
using arrays.
To
understand this example, you should have the knowledge of the following C
programming topics:
·
C
while and do...while Loop
·
C
for Loop
·
C
Arrays
Store Numbers and Calculate Average Using Arrays
#include < stdio.h >
#include
int main() {
int n, i;
float num[100], sum = 0.0, avg;
printf("Enter the numbers of elements: ");
scanf("%d", &n);
while (n > 100 || n < 1) {
printf("Error! number should in range of (1 to 100).\n");
printf("Enter the number again: ");
scanf("%d", &n);
}
for (i = 0; i < n; ++i) {
printf("%d. Enter number: ", i + 1);
scanf("%f", &num[i]);
sum += num[i];
}
avg = sum / n;
printf("Average = %.2f", avg);
return 0;
}
Output
Enter the numbers of elements:
6
1. Enter number: 45.3
2. Enter number: 67.5
3. Enter number: -45.6
4. Enter number: 20.34
5. Enter number: 33
6. Enter number: 45.6
Average = 27.69
Here, the user is first asked to
enter the number of elements. This number is assigned to n.
If the user entered integer is
greater less than 1 or greater than 100, the user is asked to enter the number
again. This is done using a while loop.
Then, we have iterated a for loop
from i = 0 to i . In each iteration of the loop, the user is asked to enter
numbers to calculate the average. These numbers are stored in
the num[] array.
scanf("%f", &num[i]);
And, the sum of each entered element is computed.
sum += num[i];
Once the for loop is completed, the average is calculated and printed on the screen.
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