Write a program that fills the right-to-left diagonal of asquare matrix with zer

Question

Write a program that fills the right-to-left diagonal of asquare matrix with zeros, the lower right triangle with -1s and theupper left triangle with +1s. The output of the program, assuming a6 by 6 matrix is shown below: 1 1 1 1 1 0 1 1 1 1 0 -1 1 1 1 0-1-1 1 1 0-1-1-1 1 0-1-1-1-1 0-1-1-1-1-1 Write a program that fills the right-to-left diagonal of asquare matrix with zeros, the lower right triangle with -1s and theupper left triangle with +1s. The output of the program, assuming a6 by 6 matrix is shown below: 1 1 1 1 1 0 1 1 1 1 0 -1 1 1 1 0-1-1 1 1 0-1-1-1 1 0-1-1-1-1 0-1-1-1-1-1

Explanation / Answer

#include<stdio.h>
#include <conio.h>
int main()
{int n,i,j;
int mat[10][10];
printf("How large is your matrix? ");
scanf("%d",&n);
for(i=0;i<n;i++)
    for(j=0;j<n;j++)
  mat[i][j]=-1;                                //start the matrix with all -1, now the bottom half is set
for(j=0;j<n;j++)                   //put the 1's in if n=6 5 1's row 0,    4 1'srow 1 etc   
   for(i=n-j-2;i>=0;i--)
      mat[j][i]=1;
for(j=0;j<n;j++)                          //this does the diagnol if n=6   6-0-1=5 lastrow     6-1-1=4 next to last row
   mat[n-j-1][j]=0;                      //starting with the bottom row

for(i=0;i<n;i++)
{for(j=0;j<n;j++)
     printf("%3d ",mat[i][j]);
printf(" ");
}
getch();
return 0;
}

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