c++换行符知识点总结

c++换行符有哪些

\n 换行，光标移到下一行的开头；

endl，把缓冲槽的内容输出到控制台；

\r 回车，光标移到当前行的开头，不会换到下一行，如果接着输出的话，本行以前的内容会被逐一覆盖；

#include <iostream>
using namespace std;  
int main() 
{ 
  cout << "this is the first line\n"; 
  cout << "this is the second line\r"; 
  cout << "this is the third line\n"; 
  cout << "this is the fouth line\r"; 
  cout << "this is the fifth line\n"; 
  cout<<"first"<<"\n"<<"second"<<endl; 
  cout<<"first123"<<"\r"<<"second"<<endl; 
  cout<<"这是换"<<endl<<"行符";
  return 0; 
}

结果：

this is the first line
this is the third linee
this is the fifth line
first
second
second23
这是换
行符
presss any key to continue

内容补充：

关于遇到的问题实例：

遇到\r获取\n的时候，替换为\0.

#include<string.h>
#include<stdio.h>
  
int main(int argc, char *argv[])
{
  char str[128];
  while (fgets(str, 127, stdin)) {
    char *tmp = null;
    //去掉换行符
    if (tmp = strstr(str, "\n"))
      *tmp = '\0';
    //去掉回车符
    if (tmp = strstr(str, "\r"))
      *tmp = '\0';
    printf("---%s---\n", str);
  }
  return 0;
}

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