C Exercises: Calculate the determinant of a 3 x 3 matrix
C Array: Exercise-28 with Solution
Write a program in C to calculate the determinant of a 3 x 3 matrix.
Pictorial Presentation:

Sample Solution:
C Code:
#include <stdio.h>
void main()
{
int arr1[10][10],i,j,n;
int det=0;
printf("\n\nCalculate the determinant of a 3 x 3 matrix :\n");
printf("-------------------------------------------------\n");
printf("Input elements in the first matrix :\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("The matrix is :\n");
for(i=0;i<3;i++)
{
for(j=0;j<3 ;j++)
printf("% 4d",arr1[i][j]);
printf("\n");
}
for(i=0;i<3;i++)
det = det + (arr1[0][i]*(arr1[1][(i+1)%3]*arr1[2][(i+2)%3] - arr1[1][(i+2)%3]*arr1[2][(i+1)%3]));
printf("\nThe Determinant of the matrix is: %d\n\n",det);
}
Sample Output:
Calculate the determinant of a 3 x 3 matrix : ------------------------------------------------- Input elements in the first matrix : element - [0],[0] : 1 element - [0],[1] : 0 element - [0],[2] : -1 element - [1],[0] : 0 element - [1],[1] : 0 element - [1],[2] : 1 element - [2],[0] : -1 element - [2],[1] : -1 element - [2],[2] : 0 The matrix is : 1 0 -1 0 0 1 -1 -1 0 The Determinant of the matrix is: 1
Flowchart:

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Previous: Write a program in C to print or display upper triangular matrix.
Next: Write a program in C to accept a matrix and determine whether it is a sparse matrix.
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C Programming: Tips of the Day
C Programming - What is the argument for printf that formats a long?
Put an l (lowercased letter L) directly before the specifier.
unsigned long n; long m; printf("%lu %ld", n, m);
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