C基本的读写操作

C基本的读写操作代码示例：

void read()

{
FILE *fp;  
    if(NULL == (fp = fopen("C:\\yag.txt", "r")))  
    {  
        printf("error\n");  
        exit(1);  
    }
    char ch;  
    while(EOF != (ch=fgetc(fp)))  
    {  
        printf("%c", ch);  
    }  
    fclose(fp); 
}
void write()
{
double x ,y ,z;x=y=z=0.0;
FILE *fp;
fp=fopen("C:\\test.txt","w");
//while()
//{
  fprintf(fp,"%lf %lf %lf\n",x,y,z);
   //给x,y,z赋新值//
//}
fclose(fp);
}