Answer to Question #196589 in C++ for kaushal

Question

Assume a text file “Test.txt” is already created. Using this file, write a

function to create three files “LOWER.TXT”, which contains all the

lowercase vowels and “UPPER.TXT” which contains all the uppercase vowels

and “DIGIT.TXT” which contains all digits.

Answer 1

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
bool in(char* c, int size, char s){
    for(int i = 0; i < size; i++)
        if(c[i] == s) return true;
    return false;
}
void file(){
        fstream test("Test.txt", ios::in), 
            lower("LOWER.txt", ios::out | ios::trunc),
            upper("UPPER.txt", ios::out | ios::trunc),
            digit("DIGIT.txt", ios::out | ios::trunc);
    string s;
    char uppercase[5] = {'A', 'E', 'I', 'O', 'U'}, 
        lowercase[5] = {'a', 'e', 'i', 'o', 'u'},
        digits[10] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
    if(test){
        while(getline(test, s)){
            for(int i = 0; i < s.length(); i++){
                if(in(lowercase, 5, s[i])) lower<<s[i]<<endl;
                if(in(uppercase, 5, s[i])) upper<<s[i]<<endl;
                if(in(digits, 10, s[i])) digit<<s[i]<<endl;
            }
        }
        test.close();
        lower.close();
        upper.close();
        digit.close();
        return;
    }
    else cout<<"Error opening test.txt";
}
int main(){
    file();
    return 0;
}