Write a program that will prompt for a template file name, a substitution string

Question

Write a program that will prompt for a template file name, a substitution string, and an output file name.

Your program will: 1. Open the template file for input. This template file will have line of inputs consist of the symbol ‘*’ or ' ' (space).

Input file: test.dat

*********

*** * ***

*********

2. Process each line in the file by replacing each ‘*’ character with the letters of the substitution string and output to an output file.

For example: Substitution string: HW6

Output file: test.txt

HW6HW6HW6

HW6 H W6H

HW6HW6HW6

Note that the substitution string is reset to the first character after each line.

Explanation / Answer

Here is the code for you.....
#include <iostream>
#include <cstring>
#include <fstream>
using namespace std;
int main()
{
string inputFile, subStr, outputFile;
cout<<"Enter the template file name: ";
cin>>inputFile;
cout<<"Enter the substitution string: ";
cin>>subStr;
cout<<"Enter the output file name: ";
cin>>outputFile;
ifstream inputFilePtr;
inputFilePtr.open(inputFile);
ofstream outputFilePtr;
outputFilePtr.open(outputFile);
int count = 0;
int len = subStr.length();
while(!inputFilePtr.eof())
{
char x;
inputFilePtr >> noskipws >> x;
if(x == ' ')
{
count = 0;
outputFilePtr << ' ';
}
if(x == '*')
outputFilePtr << subStr.at(count % len);
else
outputFilePtr << ' ';
count++;
}
}

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