Answer to Question #84599 in C++ for Yash

Question

Q12. A user has written a cpp program in capital case and saved it as "my.cpp". Since C++ recognizes only lower case, write a program to read the above file and convert the entire program to lower case and save it to another file named "mynew.cpp".

Answer 1

#include <iostream>

#include <fstream>

#include <cctype>

#include <cstring>

using namespace std;

int main( ){

ifstream fin;

ofstream fout;

fin.open("my.cpp");

fout.open("mynew.cpp");

string str;

while (!fin.eof()) {

getline(fin, str);

int n;

n = str.length();

for (int i = 0; i < n; i++) {

if (isalpha(str[i]))

fout << static_cast<char>(tolower(str[i]));

else

fout << str[i];

}

fout<< endl;

}

fin.close();

fout.close();

return 0;

}