c - fscanf == 1 做什么

Question

这段代码显然还有更多内容，但我只是好奇这行代码实际上做了什么。我知道 while 循环等，但对 fscanf()

很陌生

while (fscanf(input_file, "%s", curr_word) == 1)

Answer 1

fscanf() 返回成功扫描和存储的输入项的数量。

根据 man page

Return Value

These functions return the number of input items successfully matched and assigned, which can be fewer than provided for, or even zero in the event of an early matching failure.

就你的情况

while (fscanf(input_file, "%s", curr_word) == 1)

如果

fsaacf()能够成功扫描字符串(根据% s 格式说明符)从 input_file 并将其放入 curr_word 中。