This C program computes the determinant of a matrix.

Here is the source code of the C program to find determinant of a matrix. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

`#include<stdio.h>`

int main(){

int a[3][3], i, j;

long determinant;

printf("Enter the 9 elements of matrix: ");

for(i = 0 ;i < 3;i++)

for(j = 0;j < 3;j++)

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

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

for(i = 0;i < 3; i++){

printf("\n");

for(j = 0;j < 3; j++)

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

`}`

determinant = a[0][0] * ((a[1][1]*a[2][2]) - (a[2][1]*a[1][2])) -a[0][1] * (a[1][0]

* a[2][2] - a[2][0] * a[1][2]) + a[0][2] * (a[1][0] * a[2][1] - a[2][0] * a[1][1]);

printf("\nDeterminant of 3X3 matrix: %ld", determinant);

return 0;

`}`

$ gcc determinant.c -o determinant $ ./determinant Enter the 9 elements of matrix: 1 2 3 4 5 1 2 3 4 The matrix is 1 2 3 4 5 1 2 3 4 Determinant of 3X3 matrix: -5

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