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#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
//Struct definition
struct letterType
{
char letter;
int letterCount;
};
//Function to open I/O files
void openFile(ifstream& inFile, ofstream& outFile);
//Function to fill the array of structs and keep track of the amount of uppercase/lowercase letters
void count(ifstream& inFile, letterType letterList[], int& totalBig, int& totalSmall);
//Function to print the letters, the occurences, and the percentages
void printResult(ofstream& outFile, letterType letterList[], int totalBig, int totalSmall);
int main()
{
ifstream input; //object to read the text
ofstream output; //object to write the results
int totalCapital = 0; //variable to store the total number of uppercase
int totalLower = 0; //variable to store the total number of lowercase
letterType letterObj[52]; //array of structs of type letterType to hold the information
//Input and process data
openFile(input, output);
count(input, letterObj, totalCapital, totalLower);
printResult(output, letterObj, totalCapital, totalLower);
//Close files
input.close();
output.close();
return 0;
}
void openFile(ifstream& inFile, ofstream& outFile)
{
string inFileName;
string outFileName;
cout << "Enter the name of the input file: ";
cin >> inFileName;
inFile.open(inFileName.c_str());
cout << endl;
cout << "Enter the name of the output file: ";
cin >> outFileName;
outFile.open(outFileName.c_str());
cout << endl;
}
void count(ifstream& inFile, letterType letterList[], int& totalBig, int& totalSmall)
{
char ch;
//Loop to initialize the array of structs; set letterCount to zero
for(int index = 0; index < 26; index++)
{
//This segment sets the uppercase letters
letterList[index].letter = static_cast<char>(65 + index);
letterList[index].letterCount = 0;
//This segment sets the lowercase letters
letterList[index + 26].letter = static_cast<char>(97 + index);
letterList[index + 26].letterCount = 0;
}
//read first character
inFile >> ch;
//Keep reading until end of file is reached
while(!inFile.eof())
{
//If uppercase letter or lowercase letter is found, update data
if('A' <= ch && ch <= 'Z')
{
letterList[static_cast<int>(ch) - 65].letterCount++;
totalBig++;
}
else if('a' <= ch && ch <= 'z')
{
letterList[static_cast<int>(ch) - 71].letterCount++;
totalSmall++;
}
//read the next character
inFile >> ch;
} //end while
} //end function
void printResult(ofstream& outFile, letterType letterList[], int totalBig, int totalSmall)
{
outFile << fixed << showpoint << setprecision(2);
outFile << "Letter Occurences Percentage" << endl;
for(int index = 0; index < 52; index++)
{
if(0 <= index && index <= 25)
{
outFile << setw(4) << letterList[index].letter << setw(12) << letterList[index].letterCount << " ";
outFile << setw(15) << 100 * (letterList[index].letterCount / static_cast<double>(totalBig)) << "%" << endl;
}
else
{
outFile << setw(4) << letterList[index].letter << setw(12) << letterList[index].letterCount << " ";
outFile << setw(15) << 100 * (letterList[index].letterCount / static_cast<double>(totalSmall)) << "%" << endl;
}
} //end for
} //end function
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