吴裕雄--天生自然C语言开发：文件读写

#include <stdio.h>

int main()
{
   FILE *fp = NULL;

   fp = fopen("/tmp/test.txt", "w+");
   fprintf(fp, "This is testing for fprintf...\n");
   fputs("This is testing for fputs...\n", fp);
   fclose(fp);
}

#include <stdio.h>

int main()
{
   FILE *fp = NULL;
   char buff[];

   fp = fopen("/tmp/test.txt", "r");
   fscanf(fp, "%s", buff);
   printf("1: %s\n", buff );

   fgets(buff, , (FILE*)fp);
   printf("2: %s\n", buff );

   fgets(buff, , (FILE*)fp);
   printf("3: %s\n", buff );
   fclose(fp);

}

size_t fread(void *ptr, size_t size_of_elements,
             size_t number_of_elements, FILE *a_file);

size_t fwrite(const void *ptr, size_t size_of_elements,
             size_t number_of_elements, FILE *a_file);