C PROGRAM for display date in words

Display date in words
This program is very useful program.

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
void PrintInWords(int value);
int CheckDateFormat(int day,int month);
main()
{
 int i=0,j,year,day,mnth,k=0,checkYear,assignMonth[12],noOfDays=0,checkFormat;
 char str[10],split,substr[3][4],*month[]={" ","January","February","March","April","May","June","July","August","September","October","November","December"};
 printf("Enter Date in dd-mm-yyyy or dd/mm/yyyy format like 01-02-1018\n");
 gets(str);
 if(str[2]=='-')
 {
  split='-';
 }
 else if(str[2]=='/')
 {
  split='/';
 }
 else
 {
  printf("Enter Date Format in dd/mm/yyyy or dd-mm-yyyy if 1 is there enter 01\n");
  exit(0);
 }
 //Splitting entered date into day,month,year
 while(str[k]!='\0')
    {
        j=0;
        while(str[k]!=split&&str[k]!='\0')
        {
            substr[i][j]=str[k];
            k++;
            j++;
        }
        substr[i][j]='\0';
        i++;
        if(str[k]!='\0')
        {
            k++;
        }
    }
    day=atoi(substr[0]);
    mnth=atoi(substr[1]);
    year=atoi(substr[2]);
   int chkDate=CheckDateFormat(day,mnth);
   if(chkDate==1){
       PrintInWords(day);
    printf(", %s ,",month[mnth]);
    PrintInWords(year);
    printf("\n");
   }
   else{
    printf("Enter Valid Date Format\n");
   }



}

void PrintInWords(int value)
{
 int i,j,k=0,count,a[10];
 char *ones[]={"zero","one","two","three","four","five","six","seven","eight","nine"};
 char *temp[]={"ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"};
 char *tens[]={"-","-","twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"};
 while(value>0)
 {
  i=value%10;
  a[k]=i;
  k++;
  value/=10;
 }
 //Here if 12345 is given then a[0]=5,a[1]=4 and soon then last but one digit will be at a[1]
 int totalDigits=k-1;
 if(totalDigits<6)
   {
     for(i=totalDigits;i>=0;i--)
     {
      if(i==5 && a[i]!=0)
      {
      printf("%s lakh ",ones[a[i]]);
      }
      if(i==4 || i==3)
      {
       //Start
       if(i==4 && a[i]==0)
       {
        printf("%s thousand ",ones[a[i-1]]);
        i--;
       }
       else if(i==4 && a[i]==1)
       {
        printf("%s thousand ",temp[a[i-1]]);
        i--;
       }
       else if(i==4)
       {
        printf("%s ",tens[a[i]]);
       }
       else
       {
        printf("%s thousand ",ones[a[i]]);
       }
          //end
      }
      if(i==2 && a[i]!=0)
      {
          printf("%s hundred and ",ones[a[i]]);
      }
      if(i==2 && a[i]==0)
      {
       printf("and ");
      }
      if(i==1 || i==0)
      {
       if(i==1 && a[i]==0)
       {
        printf("%s ",ones[a[i-1]]);
        i--;
        break;
       }
          if(i==1 && a[i]==1)
       {
        printf("%s ",temp[a[i-1]]);
        i--;
        break;
       }
          if(i==1 && a[i]!=1 && a[i]!=0)
       {
        printf("%s ",tens[a[i]]);
       }
       if(i==0 && a[i]!=0)
       {
        printf("%s ",ones[a[i]]);
       }
      }
     }
   }
}

int CheckDateFormat(int day,int month)
{
 int i;
 //Checking day
   if(day<=31&&day>=1&&month<=12&&month>=1)
   {
    return 1;
   }
   else
   {
    return 0;
   }
}

Output:

Enter Date in dd-mm-yyyy or dd/mm/yyyy format like 01-02-1018
17/07/2017
seventeen , July ,two thousand and seventeen

Explanation:
This program simple to use and use to make application