Iteration
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#include "Utils.hpp" #include <iostream> #include <string> using namespace std; int main(int argc, char **argv) { int max = 5; if (argc == 2) { max = Utils::stoiWithDefault(string(argv[1]), 5); } for (int i = 0; i < max; ++i) { cout << "Hello, world!" << endl; } return 0; }
Output
$ g++ -std=c++17 Iteration1.cpp -o Iteration1 -lfmt
$ ./Iteration1 5
Hello, world!
Hello, world!
Hello, world!
Hello, world!
Hello, world!
#include <iostream> #include <string> using namespace std; int main(int argc, char **argv) { for (int i = 10; i >= 1; --i) { cout << i << endl; } cout << "Blastoff!" << endl; return 0; }
Output
$ g++ -std=c++17 Iteration2.cpp -o Iteration2 -lfmt
$ ./Iteration2
10
9
8
7
6
5
4
3
2
1
Blastoff!
#include <iostream> #include <string> using namespace std; int main(int argc, char **argv) { cout << "Even numbers up to 100..." << endl; for (int i = 2; i <= 100; i += 2) { cout << i << endl; } return 0; }
Output
$ g++ -std=c++17 Iteration3.cpp -o Iteration3 -lfmt
$ ./Iteration3
Even numbers up to 100...
2
4
6
8
10
12
14
16
18
...
82
84
86
88
90
92
94
96
98
100
#include <iostream> #include <string> using namespace std; int main(int argc, char **argv) { cout << "Floating point numbers" << endl; for (double d = 1.0; d < 2.01; d += 0.1) { cout << d << endl; } return 0; }
Output
$ g++ -std=c++17 Iteration4.cpp -o Iteration4 -lfmt
$ ./Iteration4
Floating point numbers
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2
#include <iostream> #include <string> using namespace std; int main(int argc, char **argv) { cout << "Powers of 2 up to 256!" << endl; for (int i = 1; i <= 256; i *= 2) { cout << i << endl; } return 0; }
Output
$ g++ -std=c++17 Iteration5.cpp -o Iteration5 -lfmt
$ ./Iteration5
Powers of 2 up to 256!
1
2
4
8
16
32
64
128
256
#include <clocale> #include <codecvt> #include <iostream> #include <string> std::locale utf8loc(std::locale(), new std::codecvt_utf8<wchar_t>); using namespace std; int main(int argc, char **argv) { setlocale(LC_ALL, "en_US.UTF-8"); wcout.imbue(utf8loc); wcin.imbue(utf8loc); wstring s = L"Hello, world! 🥰🇺🇸"; for (auto c : s) { wcout << c << endl; } return 0; }
Output
$ g++ -std=c++17 Iteration6.cpp -o Iteration6 -lfmt
$ ./Iteration6
H
e
l
l
o
,
w
o
r
l
d
!
🥰
🇺
🇸
Iterators
cppQuestions
- {{Who's on first?}}
- {{Who's on second?}}
- {{Who's on third?}}
Projects
More ★'s indicate higher difficulty level.
- Amortization Table
- Amortization Table (Revisited)
- Blackboard
- Blackboard (Revisited)
- Character Types
- Compute π (Monte Carlo)
- Floating Point Error
- ISBN-10 Check
- License Plate Generator
- Multiplication Table
- Number Guessing Game
- Punchcard Message
- Random Floats
- Random Integers
- Supermarket Sale
- Supermarket Sale (Revisited)
- Temperature Table
- Unicode Test
References
-
[[C++ Programming Language]], 4th Edition, Bjarne Stroustrup, Addison-Wesley, 2013, ISBN 978-0321563842.
- [[C++ Language Reference]]
- [[cplusplus.com]]
- [[Cprogramming.com]]