Write a program on Trace of matrix in C?

Answer 1

#include <conio.h>

#include <stdio.h>

void main()

{

int a[16][16];

int c=1,i,j,k,m=0,n,x;

clrscr();

printf("Enter the number of rows and columns for the square matrix \n");

scanf("%d",&n);

x=n;

while(n>=1)

{

for(k=0;k<n;k++)

a[m][k+m]=c++;

for(k=1;k<n;k++)

a[k+m][n-1+m]=c++;

for(k=n-2;k>=0;k--)

a[n-1+m][k+m]=c++;

for(k=n-2;k>0;k--)

a[k+m][m]=c++;

n=n-2;

m=m+1;

}

for(i=0;i<x;i++)

{

for(j=0;j<x;j++)

{

printf("%5d",a[i][j]);

}

printf("\n");

}

getch();

}

Answer 2

#include<stdio.h>

void main()

{

int a[6][6],n,n1,i,sum=0;

printf("Enter the order of the matrix");

scanf("%d %d"'&n,&n1);

if(n==n1)

{

printf("Enter the matrix");

for(i=0;i<n;i++)

for(j=0;j<n;j++)

scanf("%d",&a[i][j]);

printf("The matrix is\n");

for(i=0;i<n;i++)

{

for(j=0;j<n;j++)

printf("%d\t",a[i][j]);

printf("\n");

}

for(i=0;i<n;i++)

sum+=a[i][i];

printf("Trace of the matrix is=%d",sum);

}

else

printf("Enter a square matrix\n");

}

Other than the fact that the program given will fail for a square matrix which is more than 6x6 (either with odd results or probably a sigsegv) and will fail to compile as a variable is not declared, it now calculates the trace of the given matrix, as calculating the trace requires a square matrix, why ask for both dimensions instead of just asking for the size of the square matrix?

Answer 3

#include

#include

void main()

{

int a[10][10],m,n,i,j,sum=0;

clrscr();

printf("\nEnter number of rows");

scanf("%d",&m);

printf("\nEnter number of columns");

scanf("%d",&n);

if(m==n)

{

printf("Enter values for matrix");

for(i=0;i

{

for(j=0;j

{

printf("\na[%d][%d] value",i,j);

scanf("%d",&a[i][j]);

}

}

printf("\nMatrix\n");

for(i=0;i

{

for(j=0;j

{

printf("%d\t",a[i][j]);

}

printf("\n");

}

for(i=0;i

{

sum+=a[i][i];

}

printf("\nSum of diagonal elements %d",sum);

}

else

{

printf("\nSORRY!!!SQUARE MATRIX REQUIRED!!!");

}

getch();

}

Answer 4

#include<stdio.h>

int main(){

int a[10][10],i,j,sum=0,m,n;

printf("\nEnter the row and column of matrix: ");

scanf("%d %d",&m,&n);

printf("\nEnter the elements of matrix: ");

for(i=0;i<m;i++)

for(j=0;j<n;j++)

scanf("%d",&a[i][j]);

printf("\nThe matrix is\n");

for(i=0;i<m;i++){

printf("\n");

for(j=0;j<m;j++){

printf("%d\t",a[i][j]);

}

}

for(i=0;i<m;i++){

for(j=0;j<n;j++){

if(i==j)

sum=sum+a[i][j];

}

}

printf("\n\nSum of the diagonal elements of a matrix is: %d",sum);

Answer 5

//program to get numbers from user and print the matrix

#include<stdio.h>

int main()

{

int i,n,j,a[10][10];

printf("\n enter the number of elements ");

scanf("%d",&n);

for(i=0;i<n;i++){

for(j=0;j<n;j++){

printf("\n enter a[%d][%d]",i,j);

scanf("%d",&a[i][j]);

}

}

//printing the square matrix

for(i=0;i<n;i++){

for(j=0;j<n;j++){

printf("%4d",a[i][j]);

}

printf("\n");

}

return 0;

}