Inverse Matrix 3×3

Here you will get and learn the program code to make inverse matrix of 3×3 in c programming.

Inverse Matrix formula 3×3

//Inverse Matrix example

#include<stdio.h>

int main()

{

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

float determinant=0;

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++){

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

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

printf("\n");

}

//Calculate the determinant

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

determinant = determinant + (a[0][i]*(a[1][(i+1)%3]*a[2][(i+2)%3] - a[1][(i+2)%3]*a[2][(i+1)%3]));

printf("\nInverse of matrix is: \n");

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

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

printf("%.2f\t",((a[(i+1)%3][(j+1)%3] * a[(i+2)%3][(j+2)%3]) - (a[(i+1)%3][(j+2)%3]*a[(i+2)%3][(j+1)%3]))/ determinant);

printf("\n");

}

return 0;

}

Output

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