I need some guidance in this code,how can i start off with. As there is not much material on internet about this type of code so i need some help from you guys. thanks.
Code:<<Header file>
#include <iostream>
#include <string>
#include <vector>
#include "ctype.h"
using namespace std;
// some useful type definitions
typedef vector<string> PARA;
typedef unsigned int ERROR;
#define MIN_COL_WIDTH 20
#define MAX_COL_WIDTH 60
// error codes
#define ERROR_NONE 0
#define ERROR_NO_CHARS 1
#define ERROR_ILLEGAL_WIDTH 2
// function prototype
ERROR justify(unsigned int width, string in, PARA *out);
// width is the desired width of line in output (justified) text.
// "in" is the input string.
// PARA is a vector of strings, where each element is one line
// in the output justified text.
// The first element of the PARA vector is the first line of the
// output text, the second element is the second line, and so on.
// note that output text variable is declared in main function.
// it is passed by reference to "justify".
// The function returns one of the above error codes.
<<Main file>>
#include "justify.h"
int main() {
ERROR result;
unsigned int width;
string input;
PARA output;
while (1) {
// first clear the output string
output.clear();
cout << endl<< "Welcome to text justification!" << endl << endl;
cout << "Enter the output line width (between " << MIN_COL_WIDTH << " and " << MAX_COL_WIDTH << ", or 0 to exit): ";
cin >> width;
if (width == 0)
break;
cout << "Enter the string to justify below:" << endl << endl;
// read in the input string
cin.ignore();
getline(cin, input);
// justify the input for given column width
result = justify(width, input, &output);
switch(result) {
case ERROR_NONE:
cout << endl << "The justified text is:" << endl << endl;
for (unsigned int i = 0; i < output.size(); i++)
cout << output[i] << endl;
break;
case ERROR_NO_CHARS:
cout << "ERROR: No characters in input para!" << endl;
break;
case ERROR_ILLEGAL_WIDTH:
cout << "ERROR: Column width out of range!" << endl;
break;
default:
cout << "ERROR: Internal error!" << endl;
break;
}
}
}
<<Implementation file>>
#include "justify.h"
// implement the justify function below
// use push_back method of string class to insert a new character
// at the end of a string
// You can terminate a string by calling push_back on it with '\0'.
// Use the clear method of string class to remove all the
// characters from the string.
ERROR justify(unsigned int width, string in, PARA *out) {
// make sure that column width is valid
// make sure that the input is not empty string
// justify the text!
} // end function justify
