Question

How to remove the last word from a string in C++

Answer 1

#include <iostream>
#include <string>
 
int main()
{
    std::string s = "c++ c c# java python";
  
    const auto pos = s.find_last_of(" \t\n"); 
  
    s = s.substr(0, pos);
  
    std::cout << s;
}
 
  
/*
run:
  
c++ c c# java
  
*/

 

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Answer 2

#include <iostream>
#include <string>
 
using std::cout;
using std::endl;
using std::string;
 
string remove_last_word(string &s) {
 
    string::size_type pos = s.rfind(' '); 
 
    if (string::npos != pos)
        s = s.substr(0, pos);
 
    return s;
}
 
 
int main()
{
    string s = "c++ c c# java php";
 
    cout << remove_last_word(s) << endl;
}
 


/*
run:
 
c++ c c# java
 
*/

 

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