How do you remove characters from string?

Question

For eg user enters "Hello world "
I want to delete "Hello "
And output back "world"
No matter how long the string is
"This is sololearn"
Output back "is sololearn"

Answer 1

#include <string>
#include <iostream>

int main()
{
using std::string, std::cout;
string s1 {"Hello world"}, s2 {"This is SoloLearn"};

// find position of last space
string::size_type pos {s1.find_last_of( ' ' )};
// if <pos> is valid
if( pos != string::npos )
cout << s1.substr( pos + 1 ) << "\n";

pos = s2.find_last_of( ' ' );
if( pos != string::npos )
cout << s2.substr( pos + 1 ) << "\n";

return 0;
}

/*
References
https://en.cppreference.com/w/cpp/string/basic_string/npos
https://en.cppreference.com/w/cpp/string/basic_string/find_last_of
https://en.cppreference.com/w/cpp/string/basic_string/substr
*/

Answer 2

ASJAD🔹
1. The remove() function is a part pf the <algorithm> header file. You should specify that.
2. erase() is not a function, but a method on the std::string type. You should specify that too.

Sheharyar Nadeem
references to
remove() function in <algorithm>: https://en.cppreference.com/w/cpp/algorithm/remove
erase() method on string: https://en.cppreference.com/w/cpp/string/basic_string/erase

Answer 3

Print the next characters when space is encountered