Question
Write a program that reads in a line of text and replaces all four-letter words with the word "love" . For example, the input string
I hate you, you dodo!
should produce the following output:
I love you, you love!
Of course, the output will not always make sense. For example, the input string
John will run home.
should produce the following output:
Love love run love.
If the four-letter word starts wit h a capital letter, it should be replaced by "Love" , not by "love" . You need not check capitalization, except for the first letter of a word. A word is any string consisting of the letters of the alphabet and delimited at each end by a blank, the end of the line, or any other character that is not a letter. Your program should repeat this action until the user says to quit.
Answer
#include <iostream>
#include <string>
#include <cmath>
#include <cctype>
using namespace std;
const int SIZE = 40;
void get_input(string& input_line);
string replace_with_love(string input_line);
int main()
{
start:
string input_line, love_string;
get_input(input_line);
love_string = replace_with_love(input_line);
cout << love_string << endl;
system("pause");
goto start;
}
void get_input(string& input_line)
{
char answer;
string one[SIZE];
int i = 0;
string word;
cout << "Enter a line of text and press return (alternatevely, input a single character and press enter to end the program)" << endl;
getline(cin, input_line);
}
string replace_with_love(string input_line)
{
string one[SIZE];
string love_string(input_line);
string temp;
unsigned int location, location2, count = 0, Love = 0;
unsigned int pos = 0, last = 0;
if (love_string.length() <= 1)
{
system("pause");
exit(1);
}
last = input_line.find_last_of(" ");
while ((pos < input_line.length()) && (count < SIZE))
{
location = input_line.find(" ", pos);
location2 = input_line.find(" ", location + 1);
if (pos == 0)
{
one[count] = input_line.substr(pos, location);
count++;
pos = location;
continue;
}
if (last == location)
{
one[count] = input_line.substr((pos + 1), (location));
one[count + 1] = input_line.substr(pos);
pos *= 10;
}
else if ((location > (last + 10)) || (location2 > (last + 10)))
pos *= 10;
else
{
one[count] = input_line.substr(pos + 1, ((location2)-(location + 1)));
}
pos = location2;
count++;
}
for (int i = 0; i < count; i++)
{
if (one[i].length() == 4)
{
temp = one[i];
if (isupper(temp.at(0)))
{
one[i] = "Love";
Love++;
}
else
{
one[i] = "love";
Love++;
}
}
}
if (Love < 2)
{
cout << "There are not enough 4 letter words in this sentence!" << endl;
system("pause");
main();
}
else {
love_string.clear();
for (int n = 0; n < count; n++)
love_string += one[n] + " ";
return love_string;
}
}