Example of String replace()
C++
// CPP code to demonstrate std::string::replace()
#include
using namespace std;
// Function for demonstration
void replaceDemo(string s1, string s2, string s3, string s4)
{
// Using positions
cout << "Using positions:"
<< "\n";
// Replaces 7 characters from 0th index by s2
s1.replace(0, 7, s2);
cout << s1 << endl;
// Replaces 3 characters from 0th index with "Hello"
s4.replace(0, 3, "Hello ");
cout << s4 << endl;
// Replaces 5 characters from 6th index of s4 with
// 5 characters from 0th of s3
s4.replace(6, 5, s3, 0, 5);
cout << s4 << endl;
// Replaces 5 characters from 6th index of s4 with
// 6 characters from string "to all"
s4.replace(6, 5, "to all", 6);
cout << s4 << endl;
// Replaces 1 character from 12th index of s4 with
// 3 copies of '!'
s4.replace(12, 1, 3, '!');
cout << s4 << endl;
// Using iterators
cout << "\nUsing iterators:"
<< "\n";
// Replaces whole s2 string with s3
s2.replace(s2.begin(), s2.end(), s3);
cout << s2 << "\n";
// Replaces 13 characters from begin of s1 with string
// "Example"
s1.replace(s1.begin(), s1.begin() + 13, "Example");
cout << s1 << "\n";
// Replace last 7 characters of s4 with first 12
// characters of the string "geeks from- here"
s4.replace(s4.end() - 7, s4.end(), "geeks from- here",
12);
cout << s4 << "\n";
// Replaces last character with complete s2 string from
// s2.begin() till s2.end()
s4.replace(s4.end() - 1, s4.end(), s2.begin(),
s2.end());
cout << s4 << "\n";
// Replaces portion of string s4 starting from 5
// characters from s4.begin() to 15 characters from
// s4.begin() with 2 occurrences of ','
s4.replace(s4.begin() + 5, s4.begin() + 15, 2, ',');
cout << s4 << "\n";
}
// Driver code
int main()
{
string s1 = "Example of replace";
string s2 = "Demonstration";
string s3 = "GeeksforGeeks";
string s4 = "HeyWorld !";
replaceDemo(s1, s2, s3, s4);
return 0;
}...