Question

我如何一次读取一个字符串输入以调用C中的另一个函数？我认为这会起作用，但我的输出卡住了：

#define BUFFMT "%255"
#define LINE_LEN 256
#define START_COUNT 1

// filename is declared in the main file elsewhere.  I know the file opens since I tried an //old method I use to read one line at time using fgets, but I didn t know how to do one //string at a time.  Thanks.
FILE *OpenFile(const char *fileName)
{
    FILE *fptr;
    if ((fptr = fopen(fileName, "r")) == NULL) {
        fprintf(stderr, "Error opening file %s, exiting...",  fileName);
        exit(EXIT_FAILURE);
    }
    return fptr;
}

LIST *CreateList(FILE *fp) 
{
    char buf[LINE_LEN];

    while (scanf(BUFFMT"s", buf) != EOF) {
        printf("%s: 
", buf);
    }
}

Answer 1

scanf() 会从终端读取，因此它会挂起并等待您输入。请改用 fscanf(fp, BUFFMT"s", buf)。

Answer 2

请尝试使用这个而不是scanf：

fgets (buf, sizeof (buf), fp)

Answer 3

你尝试过使用fgets()了吗？

fgets()

fgets() reads up to size-1 characters from stream and stores them in buffer. fgets() stores the null character ( ) after the last character read into the buffer and returns buffer if everything works fine, or NULL on error or end of file.

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