C++:
Пошук та заміна тексту
How to: (Як робити:)
#include <iostream>
#include <string>
#include <algorithm>
int main() {
std::string text = "Hello, World! Let's replace 'World' with 'Ukraine'.";
std::string from = "World";
std::string to = "Ukraine";
// Find starting point of the sequence you want to replace
size_t start_pos = text.find(from);
if(start_pos != std::string::npos) {
// Replace it
text.replace(start_pos, from.length(), to);
}
std::cout << text << std::endl; // Output: Hello, Ukraine! Let's replace 'Ukraine' with 'Ukraine'.
return 0;
}Deep Dive (Поглиблений аналіз):
Long before C++ got its std::string::find and std::string::replace for a cleaner approach.
Alternatives like regular expressions (std::regex) exist but are heavier and slower for simple tasks. Still, they’re king for complex patterns.
On implementation: searching typically runs O(n) complexity, where n is string length. For replacing, another O(m) is added, with m being the replacement’s length. Efficient for short texts or infrequent changes but can bog down with large-scale edits. Libraries like Boost can offer performance enhancements.