replace.cpp

Thinking in C++ ２.０书籍源码光盘

//: C17:Replace.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
#include <string>
#include <iostream>
using namespace std;

void replaceChars(string& modifyMe, 
  string findMe, string newChars){
  // Look in modifyMe for the "find string"
  // starting at position 0
  int i = modifyMe.find(findMe, 0);
  // Did we find the string to replace?
  if(i != string::npos)
    // Replace the find string with newChars
    modifyMe.replace(i,newChars.size(),newChars);
}

int main() {
  string bigNews = 
   "I thought I saw Elvis in a UFO. "
   "I have been working too hard.";
  string replacement("wig");
  string findMe("UFO");
  // Find "UFO" in bigNews and overwrite it:
  replaceChars(bigNews, findMe,  replacement);
  cout << bigNews << endl;
} ///:~