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51_pattern.c
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// // C proram to print following Pattern
/*
Pattern 51.
1 1
1 2 2 1
1 2 3 3 2 1
1 2 3 4 4 3 2 1
1 2 3 4 5 5 4 3 2 1
*/
// // Header Files
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
// // Main Function Start
int main()
{
int maxRows, maxCols;
printf("\nHow Many Rows => ");
scanf("%d", &maxRows);
// // Handling Invalid Input
if (maxRows < 1)
{
printf("\n!!! Invalid Input,Plz Enter Positive Number....");
exit(0);
}
// // Determine Number of Columns According to maxRows
maxCols = maxRows * 2;
// // Print Pattern
puts("\n--------------------------------------------\n");
// // 1st Approach
int numAtCol;
for (int row = 1; row <= maxRows; row++)
{
numAtCol = 1;
for (int col = 1; col <= maxCols; col++)
{
if (col <= row || col >= maxCols + 1 - row)
{
printf("%2d", numAtCol);
}
else
printf(" ");
if (col != maxRows)
col < maxRows ? numAtCol++ : numAtCol--;
}
printf("\n");
}
// // 2nd Approach
// // int spacesInCurrentRow;
// // for (int row = 1; row <= maxRows; row++)
// // {
// // spacesInCurrentRow = maxCols - row * 2;
// // for (int col = 1; col <= row; col++)
// // printf("%2d", col);
// // for (int space = 1; space <= spacesInCurrentRow; space++)
// // printf(" ");
// // for (int col = row; col; col--)
// // printf("%2d", col);
// // printf("\n");
// // }
printf("\n");
getch();
return 0;
}
// // Main Function End