Александр Степанов - РУКОВОДСТВО ПО СТАНДАРТНОЙ БИБЛИОТЕКЕ ШАБЛОНОВ (STL) Страница 23

 IntVec::iterator iter;

 iter = find_if(v.begin(), v.end(), div_3);

 if (iter!= v.end())

  cout ‹‹ "Value " ‹‹ *iter ‹‹ " at offset " ‹‹ (iter - v.begin()) ‹‹ " is divisible by 3" ‹‹ endl;

 return 0;

}

ucompos1.cpp

#include ‹iostream.h›

#include ‹math.h›

#include ‹stl.h›

struct square_root: public unary_function‹double, double› {

 square_root() {}

 double operator() (double x_) const {return sqrt(x_);}

};

int input[3] = {-1, -4, -16};

int main() {

 int output[3];

 transform(input, input + 3, output, unary_compose‹square_root, negate‹int› ›(square_root(), negate‹int›()));

 for (int i = 0; i ‹ 3; i++) cout ‹‹ output[i] ‹‹ endl;

 return 0;

}

rawiter.cpp

#include ‹iostream.h›

#include ‹stl.h›

class X {

public:

 X(int i_ = 0): i (i_) {}

 operator int() const {return i;}

private:

 int i;

};

int main() {

 os_heap_allocator‹X› a;

 // Allocate (but do not construct) storage for 5 elements.

  os_heap_allocator‹X›::pointer p = a.allocate(5);

 raw_storage_iterator‹X*, X› r(p);

 for (int i = 0; i ‹ 5; i++) *r++ = X(i);

 for (i = 0; i ‹ 5; i++) cout ‹‹ *p++ ‹‹ endl;

 return 0;

}

set2.cpp

#include ‹iostream.h›

#include ‹stl.h›

int main() {

 set‹int, less‹int› › s;

 pair‹set‹int, less‹int› ›::const_iterator, bool› p;

 p = s.insert(42);

 if (p.second) cout ‹‹ "Inserted new element " ‹‹ *(p.first) ‹‹ endl;

 else cout ‹‹ "Existing element = " ‹‹ *(p.first) ‹‹ endl;

 p = s.insert(42);

 if (p.second) cout ‹‹ "Inserted new element " ‹‹ *(p.first) ‹‹ endl;

 else cout ‹‹ "Existing element = " ‹‹ *(p.first) ‹‹ endl;

 return 0;

}

mset3.cpp

#include ‹iostream.h›

#include ‹stl.h›

int array[] = {3, 6, 1, 2, 3, 2, 6, 7, 9};

int main() {

 multiset‹int, less‹int› › s(array, array + 9);

 multiset‹int, less‹int› ›::iterator i;

 // Return location of first element that is not less than 3

 i = s.lower_bound(3);

 cout ‹‹ "lower bound = " ‹‹ *i ‹‹ endl;

 // Return location of first element that is greater than 3

 i = s.upper_bound(3);

 cout ‹‹ "upper bound = " ‹‹ *i ‹‹ endl;

 return 0;

}

binsrch2.cpp

#include ‹stl.h›

#include ‹iostream.h›

#include ‹string.h›

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

 return ::strcmp(a_, b_) ‹  0 ? 1 : 0;

}

char* labels[] = {"aa", "dd", "ff", "jj", "ss", "zz"};

int main() {

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

 if (binary_search(labels, labels + count, "ff", str_compare)) cout ‹‹ "ff is in labels." ‹‹ endl;

 else cout ‹‹ "ff is not in labels." ‹‹ endl;

 return 0;

}

nthelem2.cpp

#include ‹stl.h›

#include ‹stdlib.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 for (int i = 0; i ‹ v1.size(); i++) v1[i] = rand() % 10;

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 nth_element(v1.begin(), v1.begin() + v1.size() / 2, v1.end(), greater‹int›());

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 return 0;

}

setintr1.cpp

#include ‹stl.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 iota(v1.begin(), v1.end(), 0);

 vector‹int› v2(10);

 iota(v2.begin(), v2.end(), 7);

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

 cout ‹‹ "v1: ";

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ "\nv2: ";

 copy(v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 set_intersection(v1.begin(), v1.end(), v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 return 0;

}

setdiff1.cpp

#include ‹stl.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 iota(v1.begin(), v1.end(), 0);

 vector‹int› v2(10);

 iota(v2.begin(), v2.end(), 7);

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

 cout ‹‹ "v1: ";

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ "\nv2: ";

 copy(v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 set_difference(v1.begin(), v1.end(), v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 return 0;

}

adjdiff2.cpp

#include ‹stl.h›

#include ‹iostream.h›

int mult(int a_, int b_) {

 return a_ * b_;

}

int main() {

 vector‹int› v(10);

 for (int i = 0; i ‹ v.size(); i++) v[i] = i + 1;

 vector‹int› rslt(v.size());

 adjacent_difference(v.begin(), v.end(), rslt.begin(), mult);

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

 copy(v.begin(), v.end(), iter);

 cout ‹‹ endl;

 copy(rslt.begin(), rslt.end(), iter);

 cout ‹‹ endl;

 return 0;

}

rotate1.cpp

#include ‹stl.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 iota(v1.begin(), v1.end(), 0);

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 for (int i = 0; i ‹ v1.size(); i++) {

  rotate(v1.begin(), v1.begin() + i, v1.end());

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

}

cout ‹‹ endl;

return 0;

}

setunon1.cpp

#include ‹stl.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 iota(v1.begin(), v1.end(), 0);

 vector‹int› v2(10);

 iota(v2.begin(), v2.end(), 7);

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

 cout ‹‹ "v1: ";

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ "\nv2: ";

 copy(v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 set_union(v1.begin(), v1.end(), v2.begin(), v2.end(), iter);

 cout ‹‹ endl;

 return 0;

}

insert1.cpp

#include ‹iostream.h›

#include ‹stl.h›

char* array1[] = {"laurie", "jennifer", "leisa"};

char* array2[] = {"amanda", "saskia", "carrie"};

int main() {

 deque‹char*› names(array1, array1 + 3);

 deque‹char*›::iterator i = names.begin() + 2;

 copy(array2, array2 + 3, insert_iterator‹deque ‹char*› ›(names, i));

 deque‹char*›::iterator j;

 for (j = names.begin(); j!= names.end(); j++) cout ‹‹ *j ‹‹ endl;

 return 0;

}

ucompos2.cpp

#include ‹iostream.h›

#include ‹math.h›

#include ‹stl.h›

struct square_root: public unary_function‹double, double› {

 square_root() {}

 double operator() (double x_) const {return sqrt(x_);}

};

int input[3] = {-1, -4, -16};

int main() {

 int output[3];

 transform(input, input + 3, output, compose1(square_root(), negate‹int›()));

 for (int i = 0; i ‹ 3; i++) cout ‹‹ output[i] ‹‹ endl;

 return 0;

}

parsrt1.cpp

#include ‹stl.h›

#include ‹stdlib.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 for (int i = 0; i ‹ v1.size(); i++)

 v1[i] = rand() % 10;

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 partial_sort(v1.begin(), v1.begin() + v1.size() / 2, v1.end());

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 return 0;

}

equal2.cpp

#include ‹stl.h›

#include ‹iostream.h›

bool values_squared(int a_, int b_) {

 return (a_ * a_ == b_);

}

int main() {

 vector‹int› v1(10);

 vector‹int› v2(10);

 for (int i = 0; i ‹ v1.size(); i++) {

  v1[i] = i;

  v2[i] = i * i;

 }

 if (equal(v1.begin(), v1.end(), v2.begin(), values_squared))

  cout ‹‹ "v2[i] == v1[i] * v1[i]" ‹‹ endl;

 else cout ‹‹ "v2[i] != v1[i] * v1[i]" ‹‹ endl;

 return 0;

}

inplmrg2.cpp

#include ‹stl.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 for (int i = 0; i ‹ v1.size(); i++) v1[i] = (v1.size() - i - 1) % 5;

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 inplace_merge(v1.begin(), v1.begin() + 5, v1.end(), greater‹int›());

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 return 0;

}

nthelem1.cpp

#include ‹stl.h›

#include ‹stdlib.h›

#include ‹iostream.h›

int main() {

 vector‹int› v1(10);

 for (int i = 0; i ‹ v1.size(); i++) v1[i] = rand() % 10;

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

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;

 nth_element(v1.begin(), v1.begin() + v1.size() / 2, v1.end());

 copy(v1.begin(), v1.end(), iter);

 cout ‹‹ endl;