c++ string erase code example
Example 1: erasing a character from a string in c++
// string::erase
int main ()
{
std::string str ("This is an example sentence.");
std::cout << str << '\n';
// "This is an example sentence."
str.erase (10,8); // ^^^^^^^^
std::cout << str << '\n';
// "This is an sentence."
str.erase (str.begin()+9); // ^
std::cout << str << '\n';
// "This is a sentence."
str.erase (str.begin()+5, str.end()-9); // ^^^^^
std::cout << str << '\n';
// "This sentence."
return 0;
}
Example 2: erase string c++
string& erase (size_t pos = 0, size_t len = npos);
/*
pos
Position of the first character to be erased.
If this is greater than the string length, it throws out_of_range.
Note: The first character in str is denoted by a value of 0 (not 1).
len
Number of characters to erase (if the string is shorter, as many characters as possible are erased).
A value of string::npos indicates all characters until the end of the string.
*/
Example 3: c++ erase remove
std::vector<int> v = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
v.erase(std::remove(v.begin(), v.end(), 5), v.end());
// v will be {0 1 2 3 4 6 7 8 9}
Example 4: how to clear a string in c++
str.clear();
Example 5: c++ erase substring
using namespace std;
string BasicString = "I dont like erasing strings";
string StrToErase = " dont";
string::size_type i = BasicString.find(StrToErase);
if (i != string::npos)
{
BasicString.erase(i, StrToErase.length());
}
cout << BasicString << "\n"; // OUTPUT: I like erasing strings