[C/C++] Gauss elimination method

// Gauss elimination method
# include<stdio.h>
# include<conio.h>

void main()
{
 int i,j,k,n;
 float a[10][10],x[10];
 float s,p;
 printf("Enter the number of equations : ");
 scanf("%d",&n) ;
 printf("\nEnter the coefficients of the equations :\n\n");

 for(i=0;i<n;i++) {
    for(j=0;j<n;j++){
        printf("a[%d][%d]= ",i+1,j+1);
        scanf("%f",&a[i][j]);
    }

    printf("d[%d]= ",i+1);
    scanf("%f",&a[i][n]);
 }

 for(k=0;k<n-1;k++){
    for(i=k+1;i<n;i++){
        p = a[i][k] / a[k][k] ;
    for(j=k;j<n+1;j++)
        a[i][j]=a[i][j]-p*a[k][j];
    }
 }

 x[n-1]=a[n-1][n]/a[n-1][n-1];
 for(i=n-2;i>=0;i--){
    s=0;
    for(j=i+1;j<n;j++){
        s +=(a[i][j]*x[j]);
        x[i]=(a[i][n]-s)/a[i][i];
    }
 }

 printf("\nThe result is:\n");
 for(i=0;i<n;i++)
  printf("\nx[%d]=%f",i+1,x[i]);

 printf("\n");
 getch();
}