Transponovanje matrice

#include <stdio.h>
#include <stdlib.h>
#define N 100

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

void main()
{
    while(1)
        {

            int i,j;
            double b;
            printf("Unesite dimenziju matrice: "); int n; scanf("%d", &n);
            if(n<=0 || n>N) break;

            double a[N][N];
             for(i=0;i<n;i++)
             {
                printf("Unesite elemente %d. vrste: ",i);
                for(j=0;j<n; scanf("%lf", &a[i][j++]));
             }

            for (i=0;i<n-1;i++)
                for(j=i+1;j<n;j++)
                    {
                        b= a[i][j]; a[i][j] = a[j][i]; a[j][i] = b;
                    }

            printf("\nTransponovana matrica izgleda ovako: \n\n");

            for (i=0;i<n;i++)
                {
                for(j=0;j<n; printf("%6.1lf", a[i][j++]));
                printf("\n\n");
                }

        }
}