[C 语言] 输入等待

#include <stdio.h>
#include <string.h>

main()
{
    char str[256];

    while (1)
    {
        printf("=> ");
        scanf("%s", str);

        if (strcmp("quit", str) == 0) break;

        printf("This is %s\n", str);
    }

    return 0;
}