Binary file write by user input then printing binary file data out
following is the program I wrote it basically takes 9 inputs and then save them into binary file. then print out the data stored in binary data and find inverse of it then print the inverse out. but its stuck in a loop somewhere. can anyone help please. and tell me whats wrong;
Code:
#include <stdio.h>
int main() {
int a[3][3],i,j;
float determinant=0;
int x;
FILE *fp = fopen ("file.bin", "wb");
printf("Enter upto 16 elements: ");
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%d",&a[i][j]);
fwrite (&x, sizeof (x), 1, fp);
fclose(fp);
printf("\nThe matrix is\n");
fopen("file.bin","rb");
while(!feof(fp))
{
for(i=0;i<3;i++)
{
printf("\n");
for(j=0;j<3;j++)
printf("%d\t",a[i][j]);
}
}
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\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");
}
fclose(fp);
return 0;
}
