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inverse.c
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inverse.c
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#include<stdio.h>
int main(){
int a[3][3];
float determinant=0;
printf("Enter a 3x3 matrix : ");
for(int i = 0; i < 3; i++)
for(int j = 0 ; j < 3; j++)
scanf("%d",&a[i][j]);
printf("\nEntered Matrix : ");
for(int i = 0; i < 3; i++){
printf("\n");
for(int j=0;j<3;j++)
printf("%d ",a[i][j]);
}
for(int 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("\n\nInverse Matrix :\n");
for(int i = 0;i < 3;i++){
for(int 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:
Enter a 3x3 matrix :
100 33 31
45 77 14
70 47 75
Entered Matrix :
100 33 31
45 77 14
70 47 75
Inverse Matrix :
0.02 -0.01 -0.01
-0.00 0.02 -0.01
-0.01 -0.00 0.02
*/