c++换行符知识点总结

2020-03-03 12:01:56王旭

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 linen"; 
  cout << "this is the second liner"; 
  cout << "this is the third linen"; 
  cout << "this is the fouth liner"; 
  cout << "this is the fifth linen"; 
  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.

#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 = '';
    //去掉回车符
    if (tmp = strstr(str, "r"))
      *tmp = '';
    printf("---%s---n", str);
  }
  return 0;
}

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