C program to print out the input number in large size

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define H 7
#define W 8 //one extra room in the char array is required for storing '\\0'
void main()
{
    char num\[11\];  //here too one extra room is needed for the '\\0'
    char c;  //for option
    int i, j, k;
    //declaring char 2D arrays and initializing with hash-printed digits
    char zero\[H\]\[W\]={" ##### ", //H=0
                     " #   # ", //H=1
                     " #   # ", //H=2
                     " #   # ", //H=3
                     " #   # ", //H=4
                     " #   # ", //H=5
                     " ##### "},//H=6

         one\[H\]\[W\]={"   #   ",
                    "  ##   ",
                    "   #   ",
                    "   #   ",
                    "   #   ",
                    "   #   ",
                    " ##### "},

         two\[H\]\[W\]={" ##### ",
                    "     # ",
                    "     # ",
                    " ##### ",
                    " #     ",
                    " #     ",
                    " ##### "},

         three\[H\]\[W\]={" ##### ",
                      "     # ",
                      "     # ",
                      " ##### ",
                      "     # ",
                      "     # ",
                      " ##### "},

         four\[H\]\[W\]={" #     ",
                     " #   # ",
                     " #   # ",
                     " ##### ",
                     "     # ",
                     "     # ",
                     "     # "},

         five\[H\]\[W\]={" ##### ",
                     " #     ",
                     " #     ",
                     " ##### ",
                     "     # ",
                     "     # ",
                     " ##### "},

         six\[H\]\[W\]={" ##### ",
                    " #     ",
                    " #     ",
                    " ##### ",
                    " #   # ",
                    " #   # ",
                    " ##### "},

         seven\[H\]\[W\]={" ##### ",
                      "     # ",
                      "     # ",
                      "  #### ",
                      "     # ",
                      "     # ",
                      "     # "},

         eight\[H\]\[W\]={" ##### ",
                      " #   # ",
                      " #   # ",
                      " ##### ",
                      " #   # ",
                      " #   # ",
                      " ##### "},

         nine\[H\]\[W\]={" ##### ",
                     " #   # ",
                     " #   # ",
                     " ##### ",
                     "     # ",
                     "     # ",
                     "     # "};

    do
    {
        printf("Enter a number upto 10 digits:- ");
        fflush(stdin);
        gets(num);
        if(strlen(num)>10)
           printf("\\nYou must enter a number upto 10 digits.\\nTry again!\\n");
        else
        {
            printf("\\n");

            k=1;
            j=0;  //controls H of each digit
            while(k<=7)  //controls height
            {
                for(i=0;i<strlen(num);i++)  //reads each digit
                {
                    if(num\[i\]=='0')
                        printf("%s", zero\[j\]);
                    else if(num\[i\]=='1')
                        printf("%s", one\[j\]);
                    else if(num\[i\]=='2')
                        printf("%s", two\[j\]);
                    else if(num\[i\]=='3')
                        printf("%s", three\[j\]);
                    else if(num\[i\]=='4')
                        printf("%s", four\[j\]);
                    else if(num\[i\]=='5')
                        printf("%s", five\[j\]);
                    else if(num\[i\]=='6')
                        printf("%s", six\[j\]);
                    else if(num\[i\]=='7')
                        printf("%s", seven\[j\]);
                    else if(num\[i\]=='8')
                        printf("%s", eight\[j\]);
                    else if(num\[i\]=='9')
                        printf("%s", nine\[j\]);
                }
                printf("\\n");
                k++;
                j++;
            }
        }
        printf("\\nEnter Y to continue:- ");
        fflush(stdin);
        scanf("%c", &c);
    }while(c=='Y'||c=='y');
}