forked from natto1784/ooplab
123 lines
2.2 KiB
Org Mode
123 lines
2.2 KiB
Org Mode
* Write a program to illustrate how to define and declare a class template for reading two data items from the keyboard and to find their sum.
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#+ATTR_LATEX: :options frame=single,breaklines=true
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#+begin_src cpp :tangle 25.cpp :wrap src text
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#include <iostream>
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using namespace std;
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template <typename T,
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typename = enable_if_t<std::is_arithmetic<T>::value, T>>
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class Foo {
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T x, y;
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public:
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Foo() {
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cout << "x: ";
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cin >> x;
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cout << "y: ";
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cin >> y;
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}
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T sum() { return x + y; };
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};
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int main() {
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Foo<float> bar;
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cout << bar.sum();
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return 0;
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}
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#+end_src
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#+begin_src text
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x: 4.3
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y: 9.1
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13.4
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#+end_src
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#+LATEX: \clearpage
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* Write a program to demonstrate the use of special functions, constructor and destructor in the class template. The program is used to find the biggest of two entered numbers.
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#+ATTR_LATEX: :options frame=single,breaklines=true
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#+begin_src cpp :tangle 26.cpp :wrap src text
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#include <iostream>
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using namespace std;
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template <typename T,
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typename = std::enable_if_t<std::is_arithmetic<T>::value, T>>
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class Foo {
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T x, y;
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public:
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Foo() {
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cout << "x: ";
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cin >> x;
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cout << "y: ";
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cin >> y;
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}
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~Foo() { cout << "Destructor called, nothing to do here."; }
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T mx() { return (x > y ? x : y); };
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};
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int main() {
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Foo<float> bar;
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cout << bar.mx() << endl;
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return 0;
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}
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#+end_src
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#+begin_src text
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x: 3.4
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y: 9.1
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9.1
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Destructor called, nothing to do here.
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#+end_src
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#+LATEX: \clearpage
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* Write a program to illustrate how template functions can be overloaded.
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#+ATTR_LATEX: :options frame=single,breaklines=true
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#+begin_src cpp :tangle 27.cpp :wrap src text
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#include <fstream>
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#include <iostream>
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using namespace std;
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const string FILE_PATH = "./27.out";
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int main() {
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string line;
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cout << "Running program till the string \"EOH\" is received via stdin"
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<< endl;
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ofstream file(FILE_PATH);
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file.close();
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file.open(FILE_PATH, ios_base::app);
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while (getline(cin, line)) {
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if (line == "EOH")
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break;
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file << line << endl;
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}
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return 0;
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}
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#+end_src
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#+begin_src text
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Running program till the string "EOH" is received via stdin
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i have a
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flayed dismembered
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corpse in front of my
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lawn
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EOH
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#+end_src
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