Exercise 2-6 (Concatenate vectors into a string)

Chapter_2     Exercise_2-5

Exercise_2-7

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Exercise 2-6     TCP1, p. 120

Exercise 2-6. Change Fillvector.cpp so that it concatenates all the elements in the vector into a single string before printing it out, but don’t try to add line numbering.

CatFillvector.cpp         download

// Copy an entire file into a vector of string, concatenate strings
#include <string>
#include <iostream>
#include <fstream>
#include <vector>
using std::cout;
using std::string;
using std::vector;
using std::ifstream;

int main()
{
vector<string> v;
ifstream in("CatFillvector.cpp");
string line;

while(getline(in, line))
{v.push_back(line);} // Add the line to the end

line = ""; // reset line
int size = v.size();
// Concatenation:
for(int i = 0; i < size; i++)
{line += v[i] + "\n";}

cout << line;
}
/*
g++ CatFillvector.cpp -o CatFillvector
./CatFillvector
*/

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