PROGRAM 44

Object

Write a program to draw a check-board and extend it using nested if-else statement.

Algorithm

1. Declare integer variables a and b.
2. Read a and b.
3. Repeat FOR b = 1 to b < 12
4. Repeat FOR a = 1 to a < 12
   • IF a = b, then
     • Write \xB2.
   • ELSE IF (a+b)(mod 2) = 0, then
     • Write \xDB.
   • ELSE
     • Write one blank space.
   • [End of IF-ELSE-IF structure.]
   • [End of inner FOR loop.]
     •      Write new line.
   • [End of outer FOR loop.]
5. Exit.

Flowchart

C++ Source Code

// program 44
#include <iostream>
using namespace std;

int main()
{
  int a, b;
  for (b = 1; b < 12; b++) // stepping down
  {
   for (a = 1; a < 12; a++) // stepping right
    {
     if (a == b) 		// left top diagonal
       cout << "\xB2"; 		// print grey
     else if ((a + b) % 2 == 0)
       cout << "\xDB"; 		// print filled rectangle
     else
       cout << " "; 		// print blank rectangle
   }
   cout << "\n"; 		// new line
  }
  return 0;
}

C Source Code

/*program 44*/
#include<stdio.h>

int main()
{
  int a, b;
  for(b=1; b<12; b++)		/* stepping down */
     {
     for(a=1; a<12; a++)	/* stepping right */
	if(a==b)        	/* left top diagonal */
	   printf("\xB2"); 	/* print grey */
	else if((a+b)%2==0)
	   printf("\xDB");    	/* print filled rectangle */
	else
	   printf(" ");        	/* print blank rectangle */
     printf("\n");        	/* new line */
     }
  return 0;
}

Output