Exercise 2-10 (SquareFloatvector)

Chapter_2     Exercise_2-9

ch2-Exercises     Chapter_3

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Exercise 2-10     TCP1, p. 120

Exercise 2-10. Create a vector<float> and put 25 numbers into it as in the previous exercises (Exercise_2-8, Exercise_2-9). Now square each number and put the result back into the same location in the vector. Display the vector before and after the multiplication.

SquareFloatvector.cpp         download

// Creating a vector that holds floats, then square its values
#include <iostream>
#include <vector>
using std::cout;
using std::endl;
using std::vector;

int main()
{
float temp;
vector<float> v;

for(float f = 0.0; f < 25; f++) // iterate over float with integer values
{v.push_back(f/2);}

int size = v.size(); // 25

for(int i = 0; i < size; i++)
{
cout << v[i] << ", ";
if (i == size/2) {cout << endl;}
}
cout << endl;

for(int i = 0; i < size; i++)
{
temp = v[i];
v[i] = temp * temp;
}

for(int i = 0; i < size; i++)
{
cout << v[i] << ", ";
if (i == size/2) {cout << endl;}
}
cout << endl;
}
/*
g++ SquareFloatvector.cpp -o SquareFloatvector
./SquareFloatvector
0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6,
6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12,
0, 0.25, 1, 2.25, 4, 6.25, 9, 12.25, 16, 20.25, 25, 30.25, 36,
42.25, 49, 56.25, 64, 72.25, 81, 90.25, 100, 110.25, 121, 132.25, 144,
*/

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