Question

How to convert text in text file to uppercase in C++

Answer 1

#include <iostream>
#include <string>
#include <fstream>
#include <algorithm>

using std::cout;
using std::endl;

int main()
{
	std::ifstream ifs("d:\\data.txt");

	std::string s((std::istreambuf_iterator<char>(ifs)), (std::istreambuf_iterator<char>()));

	ifs.close();

	if (!isalpha(s[s.size() - 1]))
		s.pop_back();

	transform(s.begin(), s.end(), s.begin(), toupper);
	
	std::ofstream ofs("d:\\data.txt");
	ofs << s;
	ofs.close();

	return 0;
}

/*
run:

C C++
C# JAVA PHP PYTHON

*/

70+ SQL courses for beginners and professionals