我正在从一个文件读取一个字符串,直到我达到一个分隔字符,美元符号.但输入迭代器正在跳过空格,因此创建的字符串没有空格.在这种情况下不是我想要的.有没有办法阻止跳绳行为？如果是这样怎么样？
这是我的测试代码.
#include <iostream>
#include <fstream>
#include <iterator>
#include <string>
// istream iterator is skipping whitespace. How do I get all chars?
void readTo(std::istream_iterator<char> iit,std::string& replaced)
{
while(iit != std::istream_iterator<char>()) {
char ch = *iit++;
if(ch != '$')
replaced.push_back(ch);
else
break;
}
}
int main() {
std::ifstream strm("test.txt");
std::string s;
if(strm.good()) {
readTo(strm,s);
std::cout << s << std::endl;
}
return 0;
}
解决方法
因为默认情况下将流配置为跳过空格,所以请使用
noskipws(strm);
标准：
basic_ios constructors
explicit basic_ios(basic_streambuf<charT,traits>* sb);Effects: Constructs an object of class basic_ios,assigning initial values to its member objects by calling
init(sb).
basic_ios();Effects: Constructs an object of class
basic_ios(27.5.2.7) leaving its member objects uninitialized.
The object shall be initialized by calling itsinitmember function. If it is destroyed before it has been
initialized the behavior is undefined.[…]
void init(basic_streambuf<charT,traits>* sb);Postconditions: The postconditions of this function are indicated in Table 118.
06001
