C ：文件读写

https://www.runoob.com/cprogramming/c-file-io.html

#include <stdio.h>

int main()
{
   FILE *fp = NULL;

   fp = fopen("G:\\Temp\\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[255];

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

   fgets(buff, 255, (FILE*)fp);
   printf("2: %s\n", buff );

   fgets(buff, 255, (FILE*)fp);
   printf("3: %s\n", buff );
   fclose(fp);

}