Read the user input for file name and output its content - C File

C examples for File:File Read

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Description

Read the user input for file name and output its content

Demo Code

#include <stdio.h>
#include <stdlib.h>

#define SLEN 81/*w  w w  . j  ava2  s  . co  m*/

void get(char * string, int n);

int main(void){
  int ch;
  FILE * fp;
  char filename[SLEN];
  unsigned long chcount = 0;

  printf("Enter a file name: ");
  get(filename, SLEN);

  if ((fp = fopen(filename, "r")) == NULL)
  {
    printf("Could not open file %s\n", filename);
    exit(EXIT_FAILURE);
  }

  while ((ch = getc(fp)) != EOF)
  {
    putc(ch, stdout);
    chcount++;
  }

  printf("File %s has %lu characters.\n", filename, chcount);

  fclose(fp);

  return 0;
}

void get(char * string, int n)
{
  fgets(string, n, stdin);

  while (*string != '\0')
  {
    if (*string == '\n')
    {
      *string = '\0';
      break;
    }
    string++;
  }
}

Result


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