电影院的上座率

#include<stdio.h>
#define M 5
#define N 4

void main()
 {
   int a[M][N]={{0,1,1},{1,1,},{1,1,1,1},{0,0,0,1}};
   int i,j,n=0;

   printf("The circumstance of sold seats;/n");

   for(i=0;i<M;i++)
     {
     for(j=0;j<N;j++)
       {
 printf("%2d",a[i][j]);
 n+=a[i][j] ;
       }
      printf("/n");
     }

      printf("The rate of sold seats:%.2f%%/n",

                (float)n/(M*N)*100) ;
  }