Inverse of Square Matrix

#include <stdio.h>
#include <stdlib.h>
#define A(I,J) (*(A+(I)*n+(J)))
#define B(I,J) (*(B+(I)*n+(J)))
#define C(I,J) (*(C+(I)*n+(J)))

#define alt printf("\n")
#define yan printf(" ");

void takearay(int ,double *);
void seearay(int ,double *);
void jordan(int ,double *,double *);
void unit(int ,double*);

int main()
{
    int n;
  double *A,*B,*C;
   printf("Number of row and column of matrix\n");
   scanf("%d",&n);

A=(double*)malloc(n*n*sizeof(double));
B=(double*)malloc(n*n*sizeof(double));
C=(double*)malloc(n*n*sizeof(double));

printf("The matrix whose inverse is desired to be calculated:");
alt;

takearay(n,A);

system("cls");

printf("The matrix whose inverse is desired to be calculated:");
alt;
      seearay(n,A);
        alt;
    unit(n,B);// creating the unit matrix n*n to obtain inverse matrix of matrix A.

alt;

  jordan(n,A,B);// calling the function which will give us ht inverse of A matrix.
 
return 0;
}


void takearay(int n,double *A){//Taking Array.
int i,j;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
scanf("%lf",&A(i,j));

}
//To see the array in any desired time to control matrix operations.
void seearay(int n,double *A){
int i,j;
for(i=0;i<n;i++){
for(j=0;j<n;j++){
printf("%lf",A(i,j));
yan;
}
alt;


}

}

 void jordan(int n,double *A,double *B){
  int i,j,k;
  int o=0;
  double m;
for(i=0;i<n;i++){

for(j=0;j<n;j++){

if(j!=i){
m=A(j,i)/A(i,i);
for(k=0;k<n;k++){
A(j,k)-=m*A(i,k);
    B(j,k)-=m*B(i,k);
}

      }        
}
}






////////////I have to divide the each row of B  by diagonal element of each row of eliminated matrix A.
for(i=0;i<n;i++){

for(j=0;j<n;j++){

B(i,j)=B(i,j)/A(o,o);
    }
o++;// o is a parameter to use the diagonal elements of A matrix.

}

printf("Invers of the matrix:");
alt;
seearay(n,B);



 }

void unit(int n ,double*B){
int i,j;
for(i=0;i<n;i++)
for(j=0;j<n;j++){
if(i==j){
B(i,j)=1;
}
else
B(i,j)=0;
}

}