Create an application that reads a file\'s contents into an array, displays the

ID: 3827922 • Letter: C

Question

Create an application that reads a file's contents into an array, displays the array's contents as a report, and calculates and displays the total of the array's values. Here is the file. Modify the application that you created in Exercise 1 so it also displays the following using functions: The average of the values in the array The largest value in the array The smallest value in the array Write a am that displays the Roman numeral equivalent of any decimal number between 1 and 20that the user enters. The Roman numerals should be stored in an array of strings and the decimal number that the user enters should be used to locate the array element holding the Roman numeral equivalent The Program should have a loop that allows the user to continue entering numbers until an end sentinel of 0 is entered.

Explanation / Answer

//Answer to qustion 1
#include<stdio.h>
#define MAX_SIZE 200

void main() {
   int *arr, count, i;
   double sum;
   FILE *fp = fopen("Sales.txt", "r"); //open Sales.txt file as read only
   arr = malloc(sizeof(double)*MAX_SIZE);
   sum = count = 0;
   while (fscanf(fp,"%lf",&arr[count]) > 0) {
       sum = sum + arr[count]; //update sum
       count ++;
   }

   fclose(fp); //close file
   printf("Contents of array are: ");
   for (i=0; i<count; i++) //print array in for loop
       printf("%lf ",arr[count]);
   printf(" Sum = %lf ",sum);    //print sum
}

2.
//Answer to question 2

#include<stdio.h>
#include<float.h>
#define MAX_SIZE 200

void main() {
   int *arr, count, i;
   double sum,avg,max,min;
   FILE *fp = fopen("Sales.txt", "r");
   arr = malloc(sizeof(double)*MAX_SIZE);
   sum = count = 0;
   min = DBL_MAX;
   max = DBL_MIN;
   while (fscanf(fp,"%lf",&arr[count]) > 0) {
       sum = sum + arr[count]; //update sum
       if (arr[count] > max) //decide and update max
           max = arr[count];
       if (arr[count] < min) //decide and update min
           min = arr[count];
       count ++;
   }

   fclose(fp);
   avg = sum/count; //calc avg
   printf("Contents of array are: "); //print all data
   for (i=0; i<count; i++)
       printf("%lf ",arr[count]);
   printf(" Sum = %lf ",sum);
   printf(" Average = %lf ",avg);
   printf(" Largest element = %lf ",max);
   printf(" Smallest element = %lf ",min);
}

3.
//Answer to question 3

#include<stdio.h>

void main() {
   char *romans[] = {"I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII", "XIII", "XIV", "XV", "XVI", "XVII", "XVIII", "XIX", "XX"}; //array fo romans
   int input;
   printf ("Enter a decimal number: "); //input number
   scanf("%d", &input);
   while(input != 0) {
       printf ("%s ",romans[input - 1]); //print roman number
       printf ("Enter a decimal number: "); //input number again
       scanf("%d", &input);
   }

}

I tried my best to keep the code as simple as possible. I have also commented the code to make your life easy. If incase you are facing any problem with the codes, please feel free to comment below. I shall be glad to help you with the code.

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