Question

C program. Using do-while loop for this question. Question: write a program to calculate the average of first n numbers.

output:

Enter the value of n : 18

The sum of first 18 numbers =171

The average of first 18 numbers = 9.00

my code couldn't give me the right avg and sum. Please help.

#include<stdio.h>

int main()
{
    int num;
    int count =0;
    int sum=0;
    float avg;

     printf("Enter the value of n: ");
    scanf("%d", &num);

    do
    {
        sum+= num;
        count++;

    } while(count<num);

    avg=sum/(float)num;

    printf("\nThe sum = %d",sum);

    printf("\nThe average= %f",avg);

    return 0;
}

Answer 1

#include<stdio.h>

int main() {
    int num;
    int count = 0;
    int sum = 0;
    float avg;

    printf("Enter the value of n: ");
    scanf("%d", &num);

    do {
        sum += count;
        count++;
    } while (count <= num);
    avg = sum / (float) num;

    printf("\nThe sum of first %d numbers = %d", num, sum);
    printf("\nThe average of first %d numbers = %f", num, avg);

    return 0;
}