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EncodeTheCode/file_extension_opt.cpp

Created January 12, 2025 20:36
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file_extension_opt.cpp
#include <iostream>
#include <string>
#include <algorithm>
bool hasPngExtension(const std::string& filename) {
size_t dotPos = filename.rfind('.');
if (dotPos == std::string::npos) return false;
std::string extension = filename.substr(dotPos + 1);
std::transform(extension.begin(), extension.end(), extension.begin(), ::tolower);
return extension == "png";
}
int main() {
std::cout << std::boolalpha
<< "File: image.png, Has .png: " << hasPngExtension("image.png") << '\n'
<< "File: image.PNG, Has .png: " << hasPngExtension("image.PNG") << '\n'
<< "File: document.pdf, Has .png: " << hasPngExtension("document.pdf") << '\n'
<< "File: no_extension, Has .png: " << hasPngExtension("no_extension") << '\n';
return 0;
}
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