Trying to make something write to a file in c++ - c++

Question

I tried programming a file writer, but when i try to write to a file with something that has multiple words it will suddenly create files.
My code
#include <fstream>
#include <iostream>
#include <unistd.h>
int main(int argc, char *argv[]) {
char cwd[256];
while (true) {
getcwd(cwd, 256);
std::string cwd_s = (std::string)cwd;
std::string Input;
std::cout << cwd_s << "> ";
std::cin >> Input;
std::ofstream file(Input);
std::cout << "cmd /";
std::cin >> Input;
file << Input;
};
for (int i; i < argc; i++) {
std::cout << argv[i] << '\n';
};
return 0;
}
I expected to get this:
C:\Users\code> File.txt
cmd /hello world!
File.txt
hello world!
But it only had "hello", it created another file named world!
I have tried changing the code, but to no avail.

Answer 1

So I have wrote this code that I think does what you expect. The behavior you were seing is because you used the same string to store the filename and the user input. Also you redefined a new file every loop (without closing the previous one). I added a signal handler since if you press Ctrl+C the program would quit without saving/closing the file.
I added comments about how you can make a better CLI interface (if you're interested)
#include <iostream>
#include <fstream>
#include <string>
#include <unistd.h>
std::ofstream outfile;
void signalHandler(int signum) {
outfile.close();
exit(signum);
}
int main() {
char cwd[256];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
std::cout << cwd << "> ";
} else {
std::cerr << "Error: Could not get current working directory." << std::endl;
return 1;
}
std::string filename;
std::getline(std::cin, filename);
outfile.open(filename);
// We intercept the Ctrl+C signal to close the file before exiting. Else nothing will be written to it.
// You can also use Ctrl+D (EOF: End Of File) to exit the program.
// The best praticte would be to implement a command line interface with a "quit" command. (like a map<string, function> for example)
signal(SIGINT, signalHandler);
// Another good practice is to check if the file did open correctly.
if (!outfile.is_open()) {
std::cerr << "Error: Could not open file for writing." << std::endl;
return 1;
}
std::cout << "cmd / ";
char ch;
while (std::cin.get(ch)) {
outfile.put(ch);
if (ch == '\n') {
std::cout << "cmd / ";
}
}
outfile.close();
return 0;
}
Hope it will help you ! And if you have any question about the code feel free to ask I'll explain !