C Program File Handling example

Top C Program to File Handling (File I/O)

C Program to File Handling (File I/O)

C Program to File Input/output.

C Program to creating, opening and closing a text file.

#include<stdio.h> #include<conio.h>  void main()         {  FILE *filep; filep = fopen("file.txt","w"); fclose(filep);   getch(); }

C Program to open and write a text file.

#include <stdio.h> #include <conio.h>   void  main() {    FILE *fptr;  if (fp = fopen("Resume.txt", "wb")) {  printf("File opened successfully and write in binary mode .");    }    else    printf("Error!");    fclose(fptr);    getch(); }

C Program to open and write to a text file using fprintf.

#include <stdio.h> #include <conio.h>  #include <stdlib.h>  void  main() {    int number;    FILE *fileptr; fileptr = fopen("D:\\program.txt","w");    if( fileptr == NULL)    {       printf("Error in file !");         exit(1);                } printf("Enter number: "); scanf("%d",&number); fprintf( "fileptr %d",number);    fclose( fileptr );     getch();    }

C Program to open and write to a text file using fprintf.

# include <stdio.h> #include <conio.h>  # include <string.h>  void main( ) {    FILE *fptr ;  char data[100] = “Welcome to Code Hub-A Computer Science Portal for Engineering UG and PG students";  fptr = fopen("program.c", "w") ;  if(fptr == NULL )     { printf( "program.c file failed to open." ) ;     }     else     {  printf("The file is now opened\n") ;   if (strlen(data) > 0 )         {  fputs(data,  fptr ) ;      fputs("\n",  fptr ) ;         }     fclose( fptr ) ; printf("Data successfully written in file \n"); printf("The file is closed.") ;     }     getch();   }

C Program to Open for reading in binary mode

#include <stdio.h> #include <conio.h>   void  main() {   FILE * fileptr;   if(fileptr= fopen("add.txt", "rb")) {   printf("File is successfully opened. ");     }   else     printf("The file is not availabe! And cannot create a new file using binary mode");    fclose( fileptr );      getch();   }

C Program to Open for writing in binary mode.

#include <stdio.h> #include <conio.h>   void main()  {    FILE * fptr;    if ( fptr  = fopen("resume.txt", "wb")) {       printf("File is successfully open and write in binary mode");     }    else     printf("Error!");      fclose( fptr );       getch();   }

C Program to file open in append mode.

#include <stdio.h> #include <conio.h>     void  main()  {      FILE *  fptr ;    if (file = fopen("resume.txt", "a")) {       printf("File is successfully open in append mode");     }    else     printf("Error in file!");       fclose( fptr );     getch(); }

C Program to Open for both reading and writing mode.

#include <stdio.h> #include <conio.h>     void  main() {    FILE * fptr; if(fptr=fopen("resume.txt", "r+")) {       printf("File is successfully open in read and write mode");      }  else    printf ("The file is not available! And cannot create a new file ");      fclose( fptr );       getch(); }

C Program to Open for append in binary mode.

#include <stdio.h> #include <conio.h>     void  main() {     FILE * fileptr;    if (file = fopen("resume.txt", "ab")) {    printf("File is successfully open in append mode");    }     else    printf ("Error!");    fclose(file);     getch(); }

C Program to Open for both reading and writing in binary mode.

#include <stdio.h> #include <conio.h>     void  main() {     FILE * fileptr;   if (fileptr = fopen("program.txt", "rb+")) {       printf("File is successfully open in reading mode");    }     else     printf("The file is not available! And cannot create a new file ");      fclose(file);     getch();   }

C Program to Open for both reading and writing.

#include <stdio.h> #include <conio.h>   void  main() {     FILE * fileptr;    if (fileptr = fopen("pogram.txt", "w+")) {      printf("File is opened successfully open in read and write mode ");    }     else     printf("Error message!");      fclose(fileptr);     getch(); }

C Program to Open for both reading and writing in binary mode.

#include <stdio.h> #include <conio.h>     void  main() {    FILE * fileptr;      if (file = fopen("Resume.txt", "wb+")) {        printf("File is opened successfully open in read and write ");    }    else    printf("Error message!");      fclose(fileptr);      getch();  }

C Program to Open for both reading and appending.

#include <stdio.h> #include <conio.h>   void  main() {    FILE * fileptr;       if (fileptr = fopen("Resume.txt", "a+")) {      printf("File is successfully open.");     }    else     printf("Error message !");    fclose(fileptr);     getch();  }

C Program to Open for both reading and appending in binary mode.

#include <stdio.h> #include <conio.h>     void  main()  {    FILE * fileptr;  if (file = fopen("resume.txt", "ab+")) {        printf("File is successfully open in read-append mode ");     }    else     printf("Error message!”);   fclose(fileptr);     getch();   }

C Program to File Handling using fgets function.

#include <stdio.h> #include <conio.h>     void  main()  {      FILE * fileptr;      char string[200];  if (fileptr = fopen("resume.txt", "r"))  {     printf("%s", fgets(string, 50, fileptr));     }      fclose(fileptr);          getch();   }

C Program to File Handling using fgetc function.

#include <stdio.h> #include <conio.h>     void  main() {     FILE * fileptr; char string;     if (fileptr = fopen("resume.txt", "r")) {       while((string=fgetc(fileptr))!=EOF)       printf("%c",string);    }     fclose(fileptr);     getch();  }

C Program to File Handling using fputs function.

#include <stdio.h> #include <conio.h>     void main() {    FILE * fileptr;    if (file = fopen("resume.txt", "w")) {   if(fputs("Code Hub", fileptr) >= 0)     printf("Content written to the file successfully.");     }    fclose(fileptr);     getch(); }

C Program to File Handling using putc function.

#include <stdio.h> #include <conio.h>   void  main()  {       FILE * fileptr;    if(fileptr=fopen("resume.txt", "w")) {       fputc('How Are You !',  fileptr );    }     fclose( fileptr );      getch();  }

C Program to storing employee information using file handling.

#include <stdio.h>   #include <conio.h>    void  main()  {      FILE *fileptr;      int emp_id;      char emp_name[30];      float total_salary;  fileptr = fopen("emp.txt", "w+"); if ( fileptr == NULL)      {  printf("File does not available in computer system\n");        return;      }  printf("Enter the emp_id\n");  scanf("%d", &emp_id);  fprintf(fptr, "Emp Id= %d\n", id); printf("Enter the employee name \n");  scanf("%s", emp_name);  fprintf(fptr, "Employee Name= %s\n", emp_name);  printf("Enter the Total Salary\n");  scanf("%f", &total_salary);  fprintf(fptr, "Total Salary= %.2f\n", total_salary);  fclose(fptr);  getch(); }