Question

For this activity, you are required to provide files called fun.cpp as well as a makefile to compile and run it. In your file, fun.cpp, should have a skeleton of a main program as per normal which you will then fill it in as per the following.

The objective of this activity is to demonstrate the basics of functions and their use. For this activity, you will need to declare your functions alongside your main program skeleton. You will use these functions inside your main program.

You will need to declare a function: echo. The echo function returns a string, and receives one as an input. Set the default value of this input variable as “echo”.

The echo function merely receives its input and returns it.

Once echo has been defined, you are going to perform a function overloading of this function. Function overloading lets one reuse a function name, but change the input vari- ables so that the same function can be used under different conditions. Therefore, define another echo function. This is declared as before, but instead of taking a single string variable, this one takes a string variable and an integer variable. This will not have any default values.

In this function, you will still return the input of the string that is passed into the function. If the number passed in is an even number (which includes 0 in this case), then it is simply appended to the string. If it is an odd number, then it is put in front of the passed in string.

The main program of your file, will work as follows. At the start of the program you will read from a file called values.txt. This file will have string lines, each on a separate line. You will then pass these strings, one line at a time, into the echo functions and print the results. The original echo function should be called first (and output first) with the second function called immediately after. Additionally, the second echo function should also be passed the line number (starting from 0) that the line they has. Each line should be printed on a new line.

For example, given the following:

this

is

a

sentence

The output (for the first line) will be:

this

this0

Answer 1

CODE: ( Compiled using Code::Blocks)

1. fun.cpp

#include <iostream>
#include <sstream>
#include <fstream>

using namespace std;

string echo(string input = "echo"){
    return input;
}

string echo(string input,int num){
    string result;
    if(num%2==0){
        stringstream stm;
        stm << input << num;
        result = stm.str();
    }else{
        stringstream stm;
        stm << num << input;
        result = stm.str();
    }
    return result;
}

int main()
{
    ifstream infile("values.txt");

    string line;
    int linenumber = 0;

    if(infile.is_open()){
        while (getline(infile, line))
        {
            cout<<echo(line)<<endl;
            cout<<echo(line,linenumber)<<endl;
            linenumber++;

        }
        infile.close();
    }
}

2. Makefile ( Generated by cbp2make):

WORKDIR = %cd%

CC = gcc.exe
CXX = g++.exe
AR = ar.exe
LD = g++.exe
WINDRES = windres.exe

INC =
CFLAGS = -Wall -fexceptions
RESINC =
LIBDIR =
LIB =
LDFLAGS =

INC_DEBUG = $(INC)
CFLAGS_DEBUG = $(CFLAGS) -g
RESINC_DEBUG = $(RESINC)
RCFLAGS_DEBUG = $(RCFLAGS)
LIBDIR_DEBUG = $(LIBDIR)
LIB_DEBUG = $(LIB)
LDFLAGS_DEBUG = $(LDFLAGS)
OBJDIR_DEBUG = obj\\Debug
DEP_DEBUG =
OUT_DEBUG = bin\\Debug\\echoo.exe

INC_RELEASE = $(INC)
CFLAGS_RELEASE = $(CFLAGS) -O2
RESINC_RELEASE = $(RESINC)
RCFLAGS_RELEASE = $(RCFLAGS)
LIBDIR_RELEASE = $(LIBDIR)
LIB_RELEASE = $(LIB)
LDFLAGS_RELEASE = $(LDFLAGS) -s
OBJDIR_RELEASE = obj\\Release
DEP_RELEASE =
OUT_RELEASE = bin\\Release\\echoo.exe

OBJ_DEBUG = $(OBJDIR_DEBUG)\\main.o

OBJ_RELEASE = $(OBJDIR_RELEASE)\\main.o

all: debug release

clean: clean_debug clean_release

before_debug:
   cmd /c if not exist bin\\Debug md bin\\Debug
   cmd /c if not exist $(OBJDIR_DEBUG) md $(OBJDIR_DEBUG)

after_debug:

debug: before_debug out_debug after_debug

out_debug: before_debug $(OBJ_DEBUG) $(DEP_DEBUG)
   $(LD) $(LIBDIR_DEBUG) -o $(OUT_DEBUG) $(OBJ_DEBUG) $(LDFLAGS_DEBUG) $(LIB_DEBUG)

$(OBJDIR_DEBUG)\\main.o: main.cpp
   $(CXX) $(CFLAGS_DEBUG) $(INC_DEBUG) -c main.cpp -o $(OBJDIR_DEBUG)\\main.o

clean_debug:
   cmd /c del /f $(OBJ_DEBUG) $(OUT_DEBUG)
   cmd /c rd bin\\Debug
   cmd /c rd $(OBJDIR_DEBUG)

before_release:
   cmd /c if not exist bin\\Release md bin\\Release
   cmd /c if not exist $(OBJDIR_RELEASE) md $(OBJDIR_RELEASE)

after_release:

release: before_release out_release after_release

out_release: before_release $(OBJ_RELEASE) $(DEP_RELEASE)
   $(LD) $(LIBDIR_RELEASE) -o $(OUT_RELEASE) $(OBJ_RELEASE) $(LDFLAGS_RELEASE) $(LIB_RELEASE)

$(OBJDIR_RELEASE)\\main.o: main.cpp
   $(CXX) $(CFLAGS_RELEASE) $(INC_RELEASE) -c main.cpp -o $(OBJDIR_RELEASE)\\main.o

clean_release:
   cmd /c del /f $(OBJ_RELEASE) $(OUT_RELEASE)
   cmd /c rd bin\\Release
   cmd /c rd $(OBJDIR_RELEASE)

.PHONY: before_debug after_debug clean_debug before_release after_release clean_release

OUTPUT:

D:lechoolbin\Debuglechoo.exe this thise 1s lis a2 sentence 3sentence Process returned θ (8x8) execution time : θ. 554 s Press any key to continue.