c++ to c converter tool
Step 1: Include necessary headers
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
#include <regex>
Step 2: Define a function to read the input C++ file
std::string readInputFile(const std::string& filename) {
std::ifstream inputFile(filename);
if (!inputFile.is_open()) {
std::cerr << "Error opening file: " << filename << std::endl;
exit(EXIT_FAILURE);
}
std::ostringstream buffer;
buffer << inputFile.rdbuf();
return buffer.str();
}
Step 3: Define a function to convert C++ syntax to C syntax
std::string convertToC(const std::string& cppCode) {
// Define regex patterns for C++ to C conversion
std::regex cppToC[] = {
std::regex("std::cout", std::regex_constants::icase),
std::regex("<<", std::regex_constants::icase),
// Add more conversion patterns as needed
};
// Define corresponding C replacements
std::string cReplacements[] = {
"printf",
",",
// Add more replacements as needed
};
// Perform the actual conversion
std::string cCode = cppCode;
for (size_t i = 0; i < sizeof(cppToC) / sizeof(cppToC[0]); ++i) {
cCode = std::regex_replace(cCode, cppToC[i], cReplacements[i]);
}
return cCode;
}
Step 4: Define a function to write the converted C code to a file
void writeOutputFile(const std::string& cCode, const std::string& filename) {
std::ofstream outputFile(filename);
if (!outputFile.is_open()) {
std::cerr << "Error opening file for writing: " << filename << std::endl;
exit(EXIT_FAILURE);
}
outputFile << cCode;
}
Step 5: Main function for program execution
int main(int argc, char argv) {
if (argc != 3) {
std::cerr << "Usage: " << argv[0] << " input.cpp output.c" << std::endl;
return EXIT_FAILURE;
}
std::string inputFilename = argv[1];
std::string outputFilename = argv[2];
std::string cppCode = readInputFile(inputFilename);
std::string cCode = convertToC(cppCode);
writeOutputFile(cCode, outputFilename);
return EXIT_SUCCESS;
}
Step 6: Compile and run the program with input and output file arguments
g++ cppToCConverter.cpp -o cppToCConverter
./cppToCConverter input.cpp output.c