C++ STL algorithm, replace_copy_if()  greater than 5 program sample

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional project setting: Set project to be compiled as C++

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C++ Code (/TP)

Other info: none

To do: Using the C++ replace_copy_if() grater than 5 to examine each element in a source range and replaces it if it satisfies a specified predicate while copying the result into a new destination range in C++ programming

To show: How to use the C++ algorithm, replace_copy_if() to examine each element in a source range and replaces it if it satisfies a specified predicate while copying the result into a new destination range in C++ programming

 

// C++ STL algorithm, replace_copy_if() greater than 5

#include <vector>

#include <list>

#include <algorithm>

#include <iostream>

using namespace std;

 

bool greaterthan(int value)

{return value > 5;}

 

int main(void)

{

// vector and list containers

vector <int> vec1;

list <int> lst1 (13);

// vector and list iterators

vector <int>::iterator Iter1;

list <int>::iterator lstIter1;

int i, j, k;

 

// push data in range

for (i = 0; i <= 9; i++)

vec1.push_back(i);

for (j = 0; j <= 3; j++)

vec1.push_back(7);

 

// print the data

cout<<"The original vec1 vector data is: ";

for(Iter1 = vec1.begin(); Iter1 != vec1.end(); Iter1++)

cout<<*Iter1<<" ";

cout<<endl;

// shuffle the data randomly

random_shuffle(vec1.begin(), vec1.end());

for(k = 0; k <= 13; k++)

vec1.push_back(3);

cout<<"\nThe original vec1 vector randomly shuffled data with appended data is:\n";

for(Iter1 = vec1.begin(); Iter1 != vec1.end(); Iter1++)

cout<<*Iter1<<" ";

cout<<endl;

// replace elements with a value of 7 in the 1st half of a vector with a value of 72 and copy it into the 2nd half of the vector

replace_copy_if(vec1.begin(), vec1.begin() + 14, vec1.end()-14, greaterthan, 72);

cout<<"\nThe vec1 vector with values of 72 replacing those greater"

<<"\n than 5 in the 1st half & copied into the 2nd half is:\n";

for(Iter1 = vec1.begin(); Iter1 != vec1.end(); Iter1++)

cout<<*Iter1<<" ";

cout<<endl;

// replace elements in a vector with a value of 72 with a value of -8 and copy into a list

replace_copy_if(vec1.begin(), vec1.begin() + 13, lst1.begin(), greaterthan, -8);

cout<<"\nA list copy of vec1 vector with the value -8\n replacing "

<<"those greater than 5 is: ";

for(lstIter1 = lst1.begin(); lstIter1 != lst1.end(); lstIter1++)

cout<<*lstIter1<<" ";

cout<<endl;

return 0;

}

 

Output examples:

 

The original vec1 vector data is: 0 1 2 3 4 5 6 7 8 9 7 7 7 7

The original vec1 vector randomly shuffled data with appended data is:

7 1 9 2 0 7 7 3 4 6 8 5 7 7 3 3 3 3 3 3 3 3 3 3 3 3 3 3

The vec1 vector with values of 72 replacing those greater

than 5 in the 1st half & copied into the 2nd half is:

7 1 9 2 0 7 7 3 4 6 8 5 7 7 72 1 72 2 0 72 72 3 4 72 72 5 72 72

A list copy of vec1 vector with the value -8

replacing those greater than 5 is: -8 1 -8 2 0 -8 -8 3 4 -8 -8 5 -8

Press any key to continue . . .

 

 

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