scanf循环直到回车

Question

I am trying to read user input with multiple fields. But the number of fields is not specified. I want to read all the words till the carriage return. i tried this code but it isnt working:

char str[256];
while(1)
{
    scanf("%s", str);
    if(str[strlen(str)] == '\n')
         break;
    else
         printf("Got %s\n", str);

}

Examples of user input:
1. store file1
I need to parse store and file1 and break out of the loop.
2. store file1 file2
I need to parse store, file1 and file2 and break out of the loop.

Wondering how to break out of the loop at the carriage return.

thanks.

Answer 1

Use

char str[256]
scanf("%255[^\n]", str); /*edit*/

which will read to a newline or (Edit:) 255 characters, whichever comes first.

Answer 2

You could read using fgets() then split the buffer using strtok() into tokens

that way you have full control of everything.

Answer 3

目前，你的char数组str [256]没有任何东西或垃圾，所以当你查找时，你将找不到它。

Answer 4

Try this.

char str[256];
while(1)
{
    scanf("%s", str);
    printf("Got %s\n",str);
    if(fgetc(stdin) == '\n')
        break;
}

Answer 5

char str[256]
scanf("%256[^\n]", str);

Be careful with that code. It will overflow the char array for long strings. You want %255 in the scanf to accommodate the null terminator.