/*
  Name: sunil kumar
  Email ID: sunilcodex@gmail.com
*/
#include<stdio.h>
#include<conio.h>
#include<string.h>
void hour12();
void hour24();
int main()
{
    system("color 5E");
    system("title Clock");
    int t,g;
    printf("enter 1 (12 hour) / 2 (24 hour)\n");
    scanf("%d",&t);
    switch(t)
    {
             case 1:
                  system("cls");
                  hour12();
                       // break;
             case 2:
                  system("cls");
                  hour24();
                        break;
             default:
                     printf("default %d not errar\n",t);
                        
    }    
    getch();
    return 0;
}
void hour12()
{
    long i;
    int sec=0,min=0,hour=0,t,g;
    char ch[4],am[]="AM",pm[]="PM";
    printf("enter hour\n");
    scanf("%d",&hour);
    if(13<hour)
    hour=1;
    printf("enter min\n");
    g=hour;
    scanf("%d",&min);
    if(61<min)
    min=0;
    printf("enter sec\n");
    scanf("%d",&sec);
    if(61<sec)
    sec=0;
    aaa:
    printf("enter 1 AM / 2 PM\n");
    scanf("%d",&t);
    switch(t)
    {
             case 1:
                  strcpy(ch,am);
                        t=1;
                        break;
             case 2:
                  strcpy(ch,pm);;
                        t=0;
                        break;
             default:
                     goto aaa;     
    }
    abc:
    sleep(1000);
    system("cls");
    printf("%02d:%02d:%02d %s",hour,min,sec,ch);  //     04:35:09 AM output program
    sec++;
    if(sec==60)
    {
               sec=0;
               min++;
    }
    if(min==60)
    {
               min=0;
               g=hour;
               hour++;
    if(hour>=12&&min==0&&sec==0)
    {
                if((g-1)==11)
                hour=1;
                if(t==1)
                {
                        strcpy(ch,pm);
                        t=1;
                }
                else
                {
                        strcpy(ch,am);
                        t=0;
                }
    }
    }
    goto abc;    
}
void hour24()
{
    long i;
    int sec=0,min=0,hour=0,t,g;
    printf("enter hour\n");
    scanf("%d",&hour);
    if(24<hour)
    hour=1;
    printf("enter min\n");
    scanf("%d",&min);
    if(61<min)
    min=0;
    printf("enter sec\n");
    scanf("%d",&sec);
    if(61<sec)
    sec=0;
    abc:
    sleep(1000);
    system("cls");
    printf("%02d:%02d:%02d",hour,min,sec);  //     04:35:09 output program
    sec++;
    g=hour;
    if(sec==60)
    {
               sec=0;
               min++;
    }
    if(min==60)
    {
               min=0;
               hour++;
               if(hour>=24&&min==0&&sec==0)
               {
                           if((g-1)==23)
                           hour=1;
               }
    }
    goto abc;
}