Find and Replace All Occurrences in a C++ String

PublishedSeptember 20, 2012

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Find and Replace All Occurrences in a C++ String

Md. Minhazul Haque

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void find_and_replace(string& source, string const& find, string const& replace) { for(string::size_type i = 0; (i = source.find(find, i)) != string::npos;) { source.replace(i, find.length(), replace); i += replace.length(); } }

#include <iostream> using namespace std; void find_and_replace(string& source, string const& find, string const& replace) { for(string::size_type i = 0; (i = source.find(find, i)) != string::npos;) { source.replace(i, find.length(), replace); i += replace.length(); } } int main() { string text; // simple replace text = "i have a blue house and a blue car"; cout << "string: " << text << endl; find_and_replace(text, "blue", "red"); cout << "replace: " << text << endl; cout << endl; // simple replace 2 text = "i love apple"; cout << "string: " << text << endl; find_and_replace(text, "apple", "banana"); cout << "replace: " << text << endl; cout << endl; // simple replace 3 text = "some-words-separated-by-hyphen"; cout << "string: " << text << endl; find_and_replace(text, "-", "_"); find_and_replace(text, "hyphen", "underscore"); cout << "replace: " << text << endl; cout << endl; // replace with empty string text = "this string has an is missing"; cout << "string: " << text << endl; find_and_replace(text, "is", ""); cout << "replace: " << text << endl; cout << endl; // replace with space text = "hello;world;"; cout << "string: " << text << endl; find_and_replace(text, ";", " "); cout << "replace: " << text << endl; return 0; }

string: i have a blue house and a blue car replace: i have a red house and a red car string: i love apple replace: i love banana string: some-words-separated-by-hyphen replace: some_words_separated_by_underscore string: this string has an is missing replace: th string has an msing string: hello;world; replace: hello world

Find and Replace All Occurrences in a C++ String

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