write function object : Function Template « Function « C++

write function object

  
#include <functional>
#include <algorithm>
#include <cctype>
#include <string>
#include <iostream>
using namespace std;

class myIsDigit : public unary_function<char, bool>{
public:
  bool operator() (char c) const { return (::isdigit(c)); }
};

bool isNumber(const string& str){
  string::const_iterator it = find_if(str.begin(), str.end(),not1(myIsDigit()));
  return (it == str.end());
}

int main(int argc, char** argv){

  cout << isNumber("12345") << endl;
  cout << isNumber("hello") << endl;
  cout << isNumber("1234a") << endl;

  return (0);
}

1.	A generic mode finding function.
2.	Function template: swap values
3.	Simple template function to accept two parameters
4.	template function for find a value
5.	Creating a custom algorithm based on template
6.	find all template function
7.	Using a Binary Function to Multiply Two Ranges
8.	Making a Sequence of Random Numbers
9.	Use a Function Object to Hold state
10.	template function for bubble sort
11.	template function for compacting the items
12.	Template copy array function
13.	function template for getting the max value
14.	Overriding a template function.
15.	Using Standard Parameters with Template Functions

write function object : Function Template « Function « C++

Related examples in the same category