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Problem Statement : Program to Print the Double Pyramid Pattern

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#include<stdio.h>
#include<conio.h>
void main()
 {
 int i,j,k;
 int blank=0;
 int lines = 6;
 char symbol='A';
 int temp ;
 int diff[7]= {0,1,3,5,7,9,11};
 clrscr();
 k=0;
 //--------------------------------Step 0    
  for(i=lines;i>=0;i--)
   {
       printf("\n");
       symbol = 'A';
 //--------------------------------Step 1    
      for(j=i;j>=0;j--)
   printf("%c ",symbol++);
 //--------------------------------Step 2    
 blank = diff[k++];
 for(j=0;j<blank;j++)
  printf("  ");
 //--------------------------------Step 3    
 symbol = 'F' - (blank/2);
 if (blank== 0)
   temp = i-1;
 else
   temp = i;
 //--------------------------------Step 4    
 for(j=0;j<=temp;j++)
   printf("%c ",symbol--);
 }
 getch();
}

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Output :

A B C D E F G F E D C B A
A B C D E F   F E D C B A
A B C D E       E D C B A
A B C D           D C B A
A B C               C B A
A B                   B A
A                       A

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Explain Me ?

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As the above coding is very difficult to understand , so I have divided Program in 5 Steps.Easy steps are as follow ,
Step 0 :
Program has 7 lines i.e (0 to 6)

int i,j,k;

Variables : i is used to trace the Current Line
Variables : j is used for Subscript variable for Different Loops
Variables : k is used to trace the diff array , for each new value of i (new line) k is incremented

int diff[7]= {0,1,3,5,7,9,11};

Variable : diff[7] is used for Storing the number of blanks
eg.

A B C D E F   F E D C B A      // 2nd Line

Here G is Missing so blank = 1;
Step 1 :

A B C D E F G 
A B C D E F   
A B C D E     
A B C D       
A B C         
A B           
A     

Will be Printed
Step 2 : Initialize Blank i.e for first line blank = 0 , for second line it will be 1 and so on

A B C D E F G 
A B C D E F   
A B C D E      
A B C D       
A B C         
A B           
A     

Will be Printed, Blanks are denoted by    
Step 3 :

symbol = 'F' - (blank/2);

Here symbol variable is initialized , Consider first Line , We are printing Letter 'F' after 'G' so initialize it .
for 3rd line
>> blank = 3 , so
>> symbol = 'F' - 1 = 'E'
step 4 :

for(j=0;j<=temp;j++)
   printf("%c ",symbol--);

Here print remaining characters , until we print 'A'

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Tags / Keywords : | Program : Pyramid, Program to Print the Pyramid, Programs : Pyramids, Pyramid Program : 1

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