calender C++

#include<stdio.h>
main()
{
      int i,j,c;
      for(i=1; i<=31;i++)
      {
               for(j = 0; j<=7; j++)
               {
                     c = i+j;
                     printf("%d   ", c);
                     }
                    
                     printf("\n");
                     }
                     getchar();
                     }