141 lines
1.7 KiB
C++
141 lines
1.7 KiB
C++
/*
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VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
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VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
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VIM: let g:argv=""
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*/
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#include <iostream>
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#include <stdexcept>
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#include <vector>
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#include <algorithm>
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#include <string>
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#include <fstream>
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/*
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#1 print numbers from 1 to N and if i is 3 mutltiple print "Fizz", if 5 multiple "Buzz".
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If both then "FizzBuzz". Otherwise print number.
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int N;
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std::cin >> N;
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for (int i = 1; i <= N; i++)
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{
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if (!(i % 3))
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std::cout << "Fizz";
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if (!(i % 5))
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std::cout << "Buzz";
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if ((i % 3) && (i % 5))
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std::cout << i;
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std::cout << std::endl;
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}
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*/
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/*
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#2 print complement of N.
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unsigned int c = 1;
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unsigned int b = N;
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while (b)
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{
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b >>= 1;
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c <<= 1;
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}
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return c-1-N;
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alternative:
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if ( !N )
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return 0;
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unsigned int b = N;
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while ((b&(b-1)))
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auto n = b&(b-1);
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return (b<<1)-1-N;
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*/
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/*
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#3
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char a[] = "";
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sizeof(a)?
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*/
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/*
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#4
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struct A {
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int x;
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A(int a) : x(a) {}
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A( const A& a ) { x=a.x; x++; }
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opertaor = ... { x=a.x; x--; }
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};
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A a(4);
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A b = a;
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std::cout << b.x;
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3?
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4?
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5?
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*/
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/*
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#5
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struct A {
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int u;
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int l;
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A(int i) : l(i), u(l + 1) {}
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};
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A a(5);
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print a.l a.u
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5 6
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compilation fail
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5 garbage ?
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*/
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//#6
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/*
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struct A {
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int d;
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virtual ~A(){}
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};
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sizeof(A)? 8 || 16
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*/
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//#7
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/*
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conceptual support for function call
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system stack
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data segment
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processor's register
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text segment
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heap
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*/
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int main ( void )
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{try{
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A a(5);
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std::cout << a.l << ' ' << a.u ;
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char c;
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std::cin >> c;
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return 0;
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}
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catch ( const std::exception& e )
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{
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std::cerr << std::endl
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<< "std::exception(\"" << e.what() << "\")." << std::endl;
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return 2;
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}
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catch ( ... )
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{
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std::cerr << std::endl
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<< "unknown exception." << std::endl;
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return 1;
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}}
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