p2-3.c

来自「UNIX程序设计教程」· C语言 代码 · 共 35 行

#include <stdio.h>
#define BUF_SIZE 8
int main(void)
{
    FILE *fd;
    struct {
        char buf[BUF_SIZE];
        char others[BUF_SIZE];
    }buffer;
    int fgets_yes;
    do {
        /* 选择使用fgets还是gets */
        fgets_yes = y_or_n_ques("Should we read by fgets()?");
        fprintf(stdout,"please enter a line\n");
        if (fgets_yes) {   /* 选择fgets */
            fgets(buffer.buf, BUF_SIZE, stdin);
            fprintf(stdout,"fgets get string \"%s\" \n",buffer.buf);
             /*如果没有读完一行，继续读 */
            while(buffer.buf[strlen(buffer.buf) - 1] != '\n'){
                   /* ...   复制buffer.buf的内容至别处 */
                fgets(buffer.buf, BUF_SIZE , stdin);
                fprintf(stdout,"fgets get string \"%s\"\n",buffer.buf);
            }
        }
        else {   /* 选择gets */
            gets(buffer.buf);
            fprintf(stdout,"fget get string \"%s\"\n",buffer.buf);
        }
        /* 查看溢出情况 */
        fprintf(stdout,"buffer.others is \"%s\"\n",buffer.others);

    } while (y_or_n_ques("continue?"));
    exit(0);
}