The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <iostream>
#include <string>
using namespace std;
int main (int argc, char** argv)
{
const string delims(" \t,.;");
string line;
// for every line read successfully
while (getline(cin,line)) {
string::size_type begIdx, endIdx;
// search beginning of the first word
begIdx = line.find_first_not_of(delims);
// while beginning of a word found
while (begIdx != string::npos) {
// search end of the actual word
endIdx = line.find_first_of (delims, begIdx);
if (endIdx == string::npos) {
// end of word is end of line
endIdx = line.length();
}
// print characters in reverse order
for (int i=endIdx-1; i>=static_cast<int>(begIdx); --i) {
cout << line[i];
}
cout << ' ';
// search beginning of the next word
begIdx = line.find_first_not_of (delims, endIdx);
}
cout << endl;
}
}