如何忽略 fscanf() 中的空格 [英] how to ignore whitespaces in fscanf()

问题描述

我需要使用 fscanf 来忽略所有空格并且不保留它.我尝试使用类似 (*) 和 [^\n] 之间的组合作为: fscanf(file," %*[^\n]s",);当然死机了，有没有什么办法只用fscanf来解决?

I need to use fscanf to ignore all the white spaces and to not keep it. I tried to use something like the combination between (*) and [^\n] as: fscanf(file," %*[^\n]s",); Of course it crashed, is there any way to do it only with fscanf?

代码:

int funct(char* name)
{
   FILE* file = OpenFileToRead(name);
   int count=0; 
   while(!feof(file)) 
   {
       fscanf(file," %[^\n]s");
       count++;
   }
   fclose(file);
   return count;
}

解决了！将原来的 fscanf() 改为:fscanf(file," %*[^\n]s");完全按照 fgets() 读取所有行，但没有保留它！

Solved ! change the original fscanf() to : fscanf(file," %*[^\n]s"); read all the line exactly as fgets() but didnt keep it!

推荐答案

在 fscanf 格式中使用空格 (" ") 会导致它读取并丢弃输入中的空格，直到它找到一个非空格字符，留下那个非空格字符- 输入上的空白字符作为要读取的下一个字符.因此，您可以执行以下操作:

Using a space (" ") in the fscanf format causes it to read and discard whitespace on the input until it finds a non-whitespace character, leaving that non-whitespace character on the input as the next character to be read. So you can do things like:

fscanf(file, " "); // skip whitespace
getc(file);        // get the non-whitespace character
fscanf(file, " "); // skip whitespace
getc(file);        // get the non-whitespace character

或

fscanf(file, " %c %c", &char1, &char2); // read 2 non-whitespace characters, skipping any whitespace before each

来自:

使用 fscanf 或 fgets 忽略空白?

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