Question

Construct this program in C programming Please.

Using a do/while loop, your program will ask/prompt the user to enter in a positive value representing the number of values they wish to have processed by the program or a value to quit/exit. If the user enters in a 0 or negative number the program should exit with a message to the user indicating they chose to exit. If the user has entered in a valid positive number, your program should pass that number to a user defined function. The user defined function will use a for loop to compute an average value. The function will use the number passed to it to determine how many times it will prompt the user to supply a value. The user may enter in any number value positive, floating point or negative. The for loop will continue to prompt the user, calculating the average of the values entered. The function should return the calculated value to the calling function. The calling function using the do/while loop should print out the average and then repeat the process until the user enters in the signal to stop as described previously.

Answer 1

Note: Function name and variable names used are arbitrary. These can be changed according to the user's choice. Please refer to code snippets for a better understanding of comments and indentations.

IDE Used: Dev C

Program Code

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

// function that will that number of input and find average
float find_avg(int tot_inp)
{
   // variables
   int itr;
   float inp_val;           // each input value
   float tot_sum = 0;       // total sum
  
   // start loop find average
   for(itr = 0; itr < tot_inp; itr++ )
   {
       // get each number
       printf("\nNumber %d : ",itr+1);
       scanf("%f", &inp_val);
      
       // calculate total sum
       tot_sum += inp_val;
   }

   // return the average
   return tot_sum/tot_inp;
  
}

int main()
{
   // variables
   int tot_inp;       // total input
   bool more;           // more inputs true or false
   float the_avg;       // the average storage variable
  
   // do till user doesn't want to quit
   do
   {
       // prompt user to enter total number of inputs
       // ask to stop by entering 0 or negative value
       printf("Input number of values to enter (press 0 or negative value to terminate) : ");
       scanf("%d",&tot_inp);
      
       // if total input greater than 0
       if(tot_inp > 0)
       {
           printf("\nEnter %d values",tot_inp);
          
           // call the average finding function
           the_avg = find_avg(tot_inp);
          
           // print the average
           printf("\nAverage of %d entered values is %0.2f\n",tot_inp, the_avg);
          
           // set more to true i.e loop continue again
           more = true;
       }
      
       // else if 0 or negative
       else
       {
           // printf exit statement and set more to false i.e doesn't want to continue
           printf("\nYou choose to exit!! Quiting............");
           more = false;
       }
   }while(more == true);
      
   return 0;
}

Code Snippets

Sample Output