如何在C字符串中编写和读取多个单词

Question

I'm doing program and in this program i have two processes, server and client. Server have to read string from input and then write into FIFO file. Client have to read strings from FIFO file and then wrote into .txt file. This are only function responsible for server and client. File FIFO and fork'ing is doing in main function.

void server(void)
{
    FILE *fp1, *fp2;
    char string[100];

    while(1)
    {
        fp1 = fopen("FIFO1", "w");
        fprintf(stdout, "Type string: ");
        scanf("%s", string);
        fputs(string, fp1);
        fclose(fp1);

        sleep(1);
    }
}
void client(void)
{
    FILE *fp,*fp1;
    char string[100];
    while(1)
    {
        fp = fopen("FIFO1", "r");
        fgets(string, 100, fp);
        fclose(fp);
        fp1 = fopen("file.txt", "a");
        fprintf(fp1,"%d_file: I get: %s\n", getpid(), string);
        fclose(fp1);    
    }
}

And my problem is when i type a string like "stack overflow", when i have two word, in my file.txt i get to lines:

8965_file: I get: stack
8965_file: I get: overflow

Is there any way to write this in one line ? Like this:

8965_file: I get: stack overflow

Answer 1

It's because of scanf() which stops reading when a white space occurs for the "%s" specifier, change it to "%99[^\\n]" or use fgets() instead but keep in mind that fgets() will read the '\\n' and fputs() will add one so you might end up with more lines than you want.

Hint : For an array use fgets(string, sizeof(string), fp); to make your code easier to maintain.

Answer 2

You can use gets(string) to get more than one word instead of using scanf() .

Reference Link : www.keizerkong.com/c/c_string.html