C++文件流小程序

#include <iostream>

using namespace std;

void fun (char *s, int a, double f)
{
    /**********found**********/
    FILE * fp;
    char ch;
    fp = fopen("filel.txt", "w");
    fprintf (fp, "%s%d%f\n", s, a, f);
    fclose(fp);
    fp = fopen("filel.txt", "r");
    printf("\nThe result:\n\n");

    /**********found**********/
    while (!feof ( fp ))                       //或者是 ch != EOF
    {
        /**********found**********/
        ch = fgetc(fp);
        putchar( ch );
        putchar('\n');
    }
    fclose(fp);

}

int main( )
{
    char a[10] = "hello!";
    int b = 12345;
    double c = 98.76;
    fun(a, b, c);
    return 0;
}