Question

IN C PROGRAMMING, NOT C++

1. Rewrite the program you submitted for A8 to use pointers, pointer notation and arithmetic, etc. as follows:
   • If you did not complete A8, you will need to start with those instructions, and then, change your code based on the instructions here
   • The main() function should:
     • Create a fixed or dynamic array, e.g., double grade[SIZE] or double *grade = malloc(...) or calloc(...)
     • Concerning the function call for getData(), pass the address of the array and its size to pointers; depending on how you change your program, it may or may not return something, but if it does, it should return an address. i.e., a pointer
     • Concerning the function call for displayData(), pass the address of the array and its size to pointers, and return nothing
     • Use the final for loop, which displays the contents of the array again without using displayData(), to demonstrate one of the ways, you can use pointers to manipulate an array; see below for more information
   • The for loops, inside of the getData() and displayData() functions, should use different ways to demonstrate how to manipulate an array, e.g., p < q vs. p + i < p + size, or whatever; see the Notes - Pointers and second video in C10, if necessary
   • Your grade will be better, if your code thoroughly demonstrates using pointers, and pointer notation and arithmetic, and follows the Code Conventions, etc.
2. Make sure your program thoroughly follows the Code Conventions, including tabs, not multiple spaces, appropriate comments at the top, PPR comments above the function definitions, heading type comments and single blank lines throughout your code to group and organize your code, e.g., // Prototypes, // Input, // Output, etc.

Here is Assignment A8 for reference.

1. Above main(), where appropriate, create a constant for the size of the array in step 2.
2. In main(), create an array called grade using the constant from step 1 and initialize it to zero.
3. Below main(), create a function called getData(), which takes and processes an array called array along with its size, and fills it with numbers given by the user. Use an array reference, not a pointer, and do NOT use a constant for this function. Also, the function does not return anything.
4. In main(), call getData() passing the grade array and its size to the function.
5. Below main(), create a function called displayData(), which takes and processes an array called array along with its size, and retrieves and displays the values from the array to the screen formatted professionally with decimal points aligned if appropriate. Use an array reference, not a pointer, and do NOT use a constant for this function. Also, the function does not return anything.
6. In main(), call displayData() passing the grade array and its size to the function.
7. In main(), using a for loop, display the data in the grade array. Do NOT use the function displayData() for this step.

Answer 1

CODE:

#include<stdio.h>
#include<conio.h>

#define SIZE 6 //define the size of array

void getData(double *array, int size){
  
   int i;
   printf("Please Enter %d numbers\n", size);
  
   for(i=0; i<size; i++){
       scanf("%lf", (array+i));//input the values from command line
   }
}

void displayData(double *array, int size){
  
   printf("\n\n ----------------- Displaying the array data ----------------------\n\n");
  
   int i;
  
   printf("\n------- Method 1 ----------\n\n");
  
   for(i=0; i<size; i++){
       printf("%.2lf ", array[i]);//print the numbers to 2 decimal places
   }
  
   printf("\n\n\n------- Method 2 ----------\n\n");
  
   for(i=0; i<size; i++){
       printf("%.2lf ", *(array+i));//print the numbers to 2 decimal places
   }
  
   printf("\n\n\n------- Method 3 ----------\n\n");
  
   for(i=0; array+i < array+size; i++){
       printf("%.2lf ", array[i]);//print the numbers to 2 decimal places
   }
  
   printf("\n\n\n------- Method 4 ----------\n\n");
  
   for(i=0; array+i < array+size; i++){
       printf("%.2lf ", *(array+i));//print the numbers to 2 decimal places
   }
}

void main(){
  
   double grade[SIZE];//create grade array of size=SIZE i.e 6
   getData(grade, SIZE);//input the data to the array
   displayData(grade, SIZE);//print the array data
   getch();//hold the console output
}

SCREENSHOTS:

OUTPUT:

In case of any doubts, dolet me know in the comments section. I'll get it resolved :)