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In C programming, working with 2D arrays at runtime

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Release： 2023-09-13 23:29:07

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In C programming, working with 2D arrays at runtime

Question

Write a C program that uses runtime compilation to calculate the sum and product of all elements in a two-dimensional array.

Solution

Run-time compilation or initialization is also known as dynamic allocation. Allocating memory at execution time (runtime) is called dynamic memory allocation.
The functions calloc() and malloc() support dynamic memory allocation.
The functions calloc() and malloc() support dynamic memory allocation. p>

In this program, we will calculate the sum of all elements and the product of all elements of a 2D array at runtime.

Logic used to calculate the sum of all elements in a two-dimensional array-

printf("Sum array is : </p><p>");
for(i=0;i<2;i++){
   for(j=0;j<3;j++){
      sum[i][j]=A[i][j]+B[i][j];
      printf("%d\t",sum[i][j]);
   }
   printf("</p><p>");
}

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Logic used to calculate the product of all elements in a two-dimensional array-

printf("Product array is : </p><p>");
for(i=0;i<2;i++){
   for(j=0;j<3;j++){
      product[i][j]=A[i][j]*B[i][j];
      printf("%d\t",product[i][j]);
   }
   printf("</p><p>");
}
}

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Example

Example demonstration

#include<stdio.h>
void main(){
   //Declaring the array - run time//
   int A[2][3],B[2][3],i,j,sum[i][j],product[i][j];
   //Reading elements into the array&#39;s A and B using for loop//
   printf("Enter elements into the array A: </p><p>");
   for(i=0;i<2;i++){
      for(j=0;j<3;j++){
         printf("A[%d][%d] :",i,j);
         scanf("%d",&A[i][j]);
      }
      printf("</p><p>");
   }
   for(i=0;i<2;i++){
      for(j=0;j<3;j++){
         printf("B[%d][%d] :",i,j);
         scanf("%d",&B[i][j]);
      }
      printf("</p><p>");
   }
   //Calculating sum and printing output//
   printf("Sum array is : </p><p>");
   for(i=0;i<2;i++){
      for(j=0;j<3;j++){
         sum[i][j]=A[i][j]+B[i][j];
         printf("%d\t",sum[i][j]);
      }
      printf("</p><p>");
   }
   //Calculating product and printing output//
   printf("Product array is : </p><p>");
   for(i=0;i<2;i++){
      for(j=0;j<3;j++){
         product[i][j]=A[i][j]*B[i][j];
         printf("%d\t",product[i][j]);
      }
      printf("</p><p>");
   }
}

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Output

Enter elements into the array A:
A[0][0] :A[0][1] :A[0][2] :
A[1][0] :A[1][1] :A[1][2] :
B[0][0] :B[0][1] :B[0][2] :
B[1][0] :B[1][1] :B[1][2] :
Sum array is :
000
000
Product array is :
000
000

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