C++ STL algorithm, replace_copy_if() greater than 6 code 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() greater than 6 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()
#include <vector>
#include <list>
#include <algorithm>
#include <iostream>
using namespace std;
bool greater6(int value)
{
return (value > 6);
}
int main(void)
{
// containers
vector <int> v1;
list <int> L1 (13);
// iterators for containers
vector <int>::iterator Iter1;
list <int>::iterator L_Iter1;
int i, j, k;
// pushing data into the containers
for (i = 0 ; i <= 9 ; i++)
v1.push_back(i);
for (j = 0; j <= 3; j++)
v1.push_back(7);
random_shuffle(v1.begin(), v1.end());
for (k = 0; k <= 13; k++)
v1.push_back(1);
// printing the data
cout<<"The original v1 vector is: ";
for (Iter1 = v1.begin(); Iter1 != v1.end(); Iter1++)
cout<<*Iter1<<" ";
cout<<endl;
// replace elements with a value of 7 in the 1st half of a vector with a value of 70 and copy it into the 2nd half of the vector
replace_copy_if(v1.begin(), v1.begin() + 14,v1.end() -14, greater6, 70);
cout<<"\nThe v1 vector with values of 70 replacing those greater"
<<"\n than 6 in the 1st half & copied into the 2nd half is: "<<endl;
for (Iter1 = v1.begin(); Iter1 != v1.end(); Iter1++)
cout<<*Iter1<<" ";
cout<<endl;
// replace elements in a vector with a value of 70 with a value of -1 and copy into a list
replace_copy_if(v1.begin(), v1.begin() + 13,L1.begin(), greater6, -1);
cout<<"\nA list copy of v1 vector with the value -1\n replacing those greater than 6 is: ";
for (L_Iter1 = L1.begin(); L_Iter1 != L1.end(); L_Iter1++)
cout<<*L_Iter1<<" ";
cout<<endl;
return 0;
}
Output examples:
The original v1 vector is: 7 1 9 2 0 7 7 3 4 6 8 5 7 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1
The v1 vector with values of 70 replacing those greater
than 6 in the 1st half & copied into the 2nd half is:
7 1 9 2 0 7 7 3 4 6 8 5 7 7 70 1 70 2 0 70 70 3 4 6 70 5 70 70
A list copy of v1 vector with the value -1
replacing those greater than 6 is: -1 1 -1 2 0 -1 -1 3 4 6 -1 5 -1
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