用c来读文件， 运行./testcread然后输入文件名

read.c

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

int main()
{
   int d = 0;
   char ch, file_name[525];
   FILE *fp;

   printf("Enter the name of file you wish to see\n");
   gets(file_name);

   fp = fopen(file_name,"r"); // read mode

   if( fp == NULL )
   {
      perror("Error while opening the file.\n");
      exit(EXIT_FAILURE);
   }

   printf("The contents of %s file are :\n", file_name);

   //while( ( ch = fgetc(fp) ) != EOF )
   while((ch=fgetc(fp)) != EOF )
      d+=1;

   printf("%d",d);


   fclose(fp);
   return 0;
}