Difference between revisions of "CPP/STL/ForEach"

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(Created page with '<source lang = "cpp"> #include <iostream> #include <algorithm> #include <vector> using namespace std; void showSquaredValue(const int n){ cout << n << "*" << n << " = " …')
 
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==ForEach.cpp==
 
<source lang = "cpp">
 
<source lang = "cpp">
−
 
 
#include <iostream>
 
#include <iostream>
 
#include <algorithm>
 
#include <algorithm>
 
#include <vector>
 
#include <vector>
  
−
using namespace std;
+
struct printFunctor
−
 
+
{
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void showSquaredValue(const int n){
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  void operator() (int x)
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cout << n << "*" << n  << " = " << n*n << endl;  
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  {
 +
    std::cout << x;
 +
  }
 +
 
 
};
 
};
  
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class RepeatSequence{
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int main()
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int begin, end;
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{
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int offset;
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  std::vector<int> v;
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public:
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  v.push_back(1);
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RepeatSequence(int first, int last): begin(first),end(last - 1), offset(begin - 1){}
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  v.push_back(2);
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RepeatSequence(): begin(),end(), offset(){}
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  v.push_back(3);
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int operator()(){
+
−
return offset = offset >= end ? begin: offset + 1;
+
−
}
+
−
};
+
  
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int main(){
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  printFunctor myPrint;
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vector<int> num;
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  std::for_each(v.begin(), v.end(), myPrint);
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const int MAX = 10;
+
−
+
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std::generate_n(std::back_insert_iterator<vector<int>>( num ),
+
−
MAX,
+
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RepeatSequence(0,5)
+
−
);
+
  
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//for each values in the vector num, show its squared value
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  return 0;
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std::for_each(num.begin(),num.end(),showSquaredValue);
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}
 +
</source>
  
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  return 0;
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==CMakeLists.txt==
−
}</source>
+
<source lang="cmake">
 +
cmake_minimum_required(VERSION 2.6)
 +
 
 +
PROJECT(ForEach)
 +
ADD_EXECUTABLE(ForEach ForEach.cpp )
 +
 
 +
</source>

Revision as of 08:19, 26 February 2011

ForEach.cpp

#include <iostream>
#include <algorithm>
#include <vector>
 
struct printFunctor
{
  void operator() (int x)
  {
    std::cout << x;
  }
 
};
 
int main()
{
  std::vector<int> v;
  v.push_back(1);
  v.push_back(2);
  v.push_back(3);
 
  printFunctor myPrint;
  std::for_each(v.begin(), v.end(), myPrint);
 
  return 0;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
PROJECT(ForEach)
ADD_EXECUTABLE(ForEach ForEach.cpp )
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