РУКОВОДСТВО ПО СТАНДАРТНОЙ БИБЛИОТЕКЕ ШАБЛОНОВ (STL)

Менг Ли

#include ‹iostream.h›

#include ‹stl.h›

struct odd: public unary_function‹int, bool› {

 odd {}

 bool operator (int n_) const {return (n_ % 2) - 1;}

};

struct positive: public unary_function‹int, bool› {

 positive {}

 bool operator (int n_) const {return n_ ›= 0;}

};

int array[6] = {-2, -1, 0, 1, 2, 3};

int main {

 int* p = find_if(array, array + 6, compose2(logical_and‹bool›, odd, positive));

 if (p != array + 6) cout ‹‹ *p ‹‹ " is odd and positive" ‹‹ endl;

 return 0;

}

error3.cpp

#include ‹stl.h›

// Compile this code without defining OS_USE_EXCEPTIONS.

void my_handler(int code_, const char* str_) {

 cout ‹‹ "Caught " ‹‹ str_ ‹‹ "[code " ‹‹ code_ ‹‹ "]" ‹‹ endl;

}

int main {

 os_handler_function_t old_h = os_set_error_handler(my_handler);

 vector‹int› v;

 v.pop_back; // Generates an empty object error.

 cout ‹‹ "returned from pop_back" ‹‹ endl;

 os_set_error_handler(old_h);

 v.pop_back; // Generates an empty object error.

 cout ‹‹ "successful termination" ‹‹ endl;

 return 0;

}

incl0.cpp

#include ‹stl.h›

#include ‹iostream.h›

int numbers1[5] = {1, 2, 3, 4, 5};

int numbers2[5] = {1, 2, 4, 8, 16};

int numbers3[2] = {4, 8};

int main {

 if (includes(numbers1, numbers1 + 5, numbers3, numbers3 + 2))

cout ‹‹ "numbers1 includes numbers3" ‹‹ endl;

 else cout ‹‹ "numbers1 does not include numbers3" ‹‹ endl;

 if (includes(numbers2, numbers2 + 5, numbers3, numbers3 + 2))

cout ‹‹ "numbers2 includes numbers3" ‹‹ endl;

 else cout ‹‹ "numbers2 does not include numbers3" ‹‹ endl;

 return 0;

}

setdiff2.cpp

#include ‹stl.h›

#include ‹iostream.h›

#include ‹string.h›

char* word1 = "ABCDEFGHIJKLMNO";

char* word2 = "LMNOPQRSTUVWXYZ";

int main {

 ostream_iterator‹char› iter(cout, " ");

 cout ‹‹ "word1: ";

 copy(word1, word1 + ::strlen(word1), iter);

 cout ‹‹ "\nword2: ";

 copy(word2, word2 + ::strlen(word2), iter);

 cout ‹‹ endl;

 set_difference(word1, word1 + ::strlen(word1), word2, word2 + ::strlen(word2), iter, less‹char›);

 cout ‹‹ endl;

 return 0;

}

setunon2.cpp

#include ‹stl.h›

#include ‹iostream.h›

#include ‹string.h›

char* word1 = "ABCDEFGHIJKLMNO";

char* word2 = "LMNOPQRSTUVWXYZ";

int main {

 ostream_iterator‹char› iter(cout, " ");

 cout ‹‹ "word1: ";

 copy(word1, word1 + ::strlen(word1), iter);

 cout ‹‹ "\nword2: ";

 copy(word2, word2 + ::strlen(word2), iter);

 cout ‹‹ endl;

 set_union(word1, word1 + ::strlen(word1), word2, word2 + ::strlen(word2), iter, less‹char›);

 cout ‹‹ endl;

 return 0;

}

unique2.cpp

#include ‹stl.h›

#include ‹iostream.h›

#include ‹string.h›

bool str_equal(const char* a_, const char* b_) {

 return ::strcmp(a_, b_) == 0 ? 1: 0;

}

char* labels[] = {"Q","Q","W","W","E","E","R","T","T","Y","Y"};

int main {

 const unsigned count = sizeof(labels) / sizeof(labels[0]);

 ostream_iterator‹char*› iter(cout);

 copy(labels, labels + count, iter);

 cout ‹‹ endl;

 unique(labels, labels + count, str_equal);

 copy(labels, labels + count, iter);

 cout ‹‹ endl;

 return 0;

}