C program to find the address of 2-D array element

C program to find the address of 2-D array element

#include <stdio.h>     // header files
#include <stdlib.h>
#include<math.h>
int main()     // main function
{ 
  long int LocR,LocC,B,W,M,N,i,j,Lr,Ur,Lc,Uc,check;  // declaration of variables
  printf("This is a simple program to find the address the address location of 'a[i][j]' in 2D array\n");
  
  printf("Enter W that is size of one array element \n");
  scanf("%d",&W);

  printf("Enter Base address\n");
  scanf("%d",&B);

  printf("Enter Lower Limit Of Row\n");
  scanf("%d",&Lr);

  printf("Enter Upper Limit Of Row\n");
  scanf("%d",&Ur);

  printf("Enter Lower Limit Of Column\n");
  scanf("%d",&Lc);

  printf("Enter Upper Limit of Column\n");
  scanf("%d",&Uc);

  printf("Enter Row Subscript whose address to be found\n");
  scanf("%d",&i);

  printf("Enter Colum Subscript whose address to be found\n");
  scanf("%d",&j);

  M=(Ur-Lr)+1;     // "M" is no. of Rows
  N=(Uc-Lc)+1;     // "N" is no. of Columns
  
  LocR=B+(W*(N*(i-Lr)+(j-Lc)));  // formula for row major system
  LocC=B+(W*((i-Lr)+M*(j-Lc)));  // formula for column major system

  label: printf("Select 1 to follow RMS & select 2 to follow CMS\n");  // Label is placed here beacuse goto uses it furthur
  scanf("%d",&check);

switch(check)
  {
 case 1:printf("Accoring to RMS system address of arr[%ld][%ld] is %ld",i,j,LocR);
 break;
 case 2:printf("\n Accoring to CMS system address of arr[%ld][%ld] is %ld",i,j,LocC);
 break;
 default:printf("Please enter valid System Number indicated above\n");
 goto label;    // goto fuction is used here
  }
return 0;
}    // end of main function

RESULT – Output

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