C Program to Copy and Merge File

Program 1

// Program for copy file
#include<stdio.h>
#include<conio.h>
int main()
{
    FILE *fp1,*fp2;
    char ch;
    system("cls");
    fp1=fopen("d://mydata/mystring.txt","r");
    fp2=fopen("d://mydata/mytemp.txt","w"); 
    if(fp1==NULL || fp2==NULL)
      printf("\n File error");
    else
    {
          while((ch=fgetc(fp1))!=EOF)
          {
              fputc(ch,fp2);
          }
          fclose(fp1);
          fclose(fp2);
          printf("File copied.......");
    }  
return 0;
}

Program 2

// Program for merge file
#include<stdio.h>
#include<conio.h>
int main()
{
      FILE *fp1=NULL,*fp2=NULL,*fp3=NULL;
      char ch;
      system("cls");
        fp1=fopen("d://mydata/mystring.txt","r");
        fp2=fopen("d://mydata/student.txt","r");
        fp3=fopen("d://mydata/stringstudent.txt","a");
        if(fp1==NULL || fp2==NULL|| fp3==NULL)
           printf("File error");
        else
        {
              while((ch=fgetc(fp1))!=EOF)
              {
                    fputc(ch,fp3);
              }
              fclose(fp1);
                   
            while((ch=fgetc(fp2))!=EOF)
              {
                    fputc(ch,fp3);
              }  
              fclose(fp2);
              fclose(fp3);
              printf("Merging done");
        }     
}

Program 3

// Program for count space ,lines , letter
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
int main()
{
    int lt=0,sp=0,nl=0;
    FILE *fp=NULL;
    char ch;
    system("cls");
    fp=fopen("d://mydata/student.txt","r");
    if(fp==NULL)
      printf("file not found");
    else
    {
        while((ch=fgetc(fp))!=EOF)
        {
             if(iswspace(ch))
                sp++;
             else if(isupper(ch))
               nl++;
             else
               lt++;     
        }
        printf("\nTotal Letters : %d",lt);
        printf("\nTotal Space  : %d",sp);
        printf("\nTotal Lines   : %d",nl);
        fclose(fp);
    }  
    return 0;
}