所以我的程序的特定部分如下所示:
printf("Please input command:\n>");
While 1 {
if ((int c = read(STDIN_FILENO, input, Buffer_size) == 0) {
break;
}
rest of the program uses strtok to break the input
down and store in array. Then pass it to a function which checks for
various commands and prints whatever was the command
suppose to do or gives syntax error for incorrect commands
printf(">"); //last line
}
所以这就是发生的事情:
Please input command:
addperson Batman
>person added
blahblah
Error: incorrect syntax
由于某种原因,它不打印:“>”。同样,每次我输入任何内容后,即使使用正确的命令,它也会说同样的话。
但如果我使用这个:
printf("Please input command:\n>");
while 1 {
if (fgets(input, Buffer_size, stdin) == NULL) {
break;
}
...
printf(">");
}
我得到:
Please input command:
> add_person Batman
person added
> blahbagwa
Incorrect syntax
> add_person Superman
person added
注意“>”如何出现在每个输出中?我真的不知道为什么 read 不能正常工作;也许我对阅读的理解不是很好。有谁有想法吗?