C Programming Code Examples
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Program to Solve the Magic Squares Puzzle without using Recursion
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/* Program to Solve the Magic Squares Puzzle without using Recursion
The following C program, using iteration, finds the magic square for a given odd sized number. A magic square is an arrangement of numbers from 1 to n^2 in an [n x n] matrix, with each number occurring exactly once, and such that the sum of the entries of any row, any column, or any main diagonal is the same. */
#include <stdio.h>
void magicsq(int, int [][10]);
int main( )
{
int size;
int a[10][10];
printf("Enter the size: ");
scanf("%d", &size);
if (size % 2 == 0)
{
printf("Magic square works for an odd numbered size\n");
}
else
{
magicsq(size, a);
}
return 0;
}
void magicsq(int size, int a[][10])
{
int sqr = size * size;
int x = 0, y = size / 2, k;
for (k = 1; k <= sqr; ++k)
{
a[x][y] = k;
x--;
y++;
if (k % size == 0)
{
x += 2;
--y;
}
else
{
if (y == size)
{
y -= size;
}
else if (x < 0)
{
x += size;
}
}
}
for (x = 0; x < size; x++)
{
for (y = 0; y < size; y++)
{
printf("%d ", a[x][y]);
}
printf("\n");
}
printf("\n");
}
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