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C++ Tutorial

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C++ If...Else
if else else if Short hand if..else Nested if Logical Operators Real-Life Examples Code Challenge
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Memory Management new and delete Smart Pointers

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How Tos Add Two Numbers Swap Two Variables Even or Odd Number Reverse a Number Positive or Negative Square Root Area of Rectangle Celsius to Fahrenheit Sum of Digits Armstrong Number Random Number Count Words Count Vowels in a String Remove Vowels Count Digits in a String Reverse a String Palindrome Check Check Anagram Split a String Remove Whitespace Count Character Frequency Sum of Array Elements Find Array Average Sort an Array Find Smallest Element Find Largest Element Second Largest Array Min and Max in Array Merge Two Arrays Remove Duplicates Find Duplicates Shuffle an Array Factorial of a Number Fibonacci Sequence Find GCD Check Prime Number Loop Through a Vector Loop Through a Map

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C++ Reference

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alignas alignof and and_eq asm auto bitand bitor bool break case catch char char16_t char32_t class compl const const_cast constexpr continue decltype default delete do double dynamic_cast else enum explicit export extern false final float for friend goto if inline int long mutable namespace new noexcept not not_eq nullptr operator or or_eq override private protected public register reinterpret_cast return short signed sizeof static static_assert static_cast struct switch template this thread_local throw true try typedef typeid typename union unsigned using virtual void volatile wchar_t while xor xor_eq
C++ <algorithm>
adjacent_find() all_of() any_of() binary_search() copy() count() count_if() fill() find() find_first_of() find_if() find_if_not() for_each() includes() is_permutation() is_sorted() is_sorted_until() lower_bound() max_element() merge() min_element() none_of() random_shuffle() replace() replace_copy() replace_copy_if() replace_if() reverse() reverse_copy() search() sort() swap() swap_ranges() upper_bound()
C++ <cctype>
isalnum() isalpha() isblank() iscntrl() isdigit() isgraph() islower() isprint() ispunct() isspace() isupper() isxdigit() tolower() toupper()
C++ <cmath>
abs(x) acos(x) acosh(x) asin(x) asinh(x) atan(x) atan2(y, x) atanh(x) cbrt(x) ceil(x) copysign(x, y) cos(x) cosh(x) exp(x) exp2(x) expm1(x) erf(x) erfc(x) fabs(x) fdim(x, y) floor(x) fma(x, y, z) fmax(x, y) fmin(x, y) fmod(x, y) frexp(x, y) hypot(x, y) ilogb(x) ldexp(x, y) lgamma(x) llrint(x) llround(x) log(x) log10(x) log1p(x) log2(x) logb(x) lrint(x) lround(x) modf(x, y) nan(s) nearbyint(x) nextafter(x, y) nexttoward(x, y) pow(x, y) remainder(x, y) remquo(x, y, z) rint(x) round(x) scalbln(x, y) scalbn(x, y) sin(x) sinh(x) sqrt(x) tan(x) tanh(x) tgamma(x) trunc(x)
C++ <cstdlib>
abs() atof() atoi() atol() div() exit() rand() srand()
C++ <cstring>
memchr() memcmp() memcpy() memmove() memset() strcat() strchr() strcmp() strcoll() strcpy() strcspn() strerror() strlen() strncat() strncmp() strncpy() strpbrk() strrchr() strspn() strstr() strtok() strxfrm()
C++ <ctime>
asctime() clock() ctime() difftime() gmtime() localtime() mktime() strftime() time()
C++ <deque>
assign() at() back() begin() clear() empty() end() erase() front() insert() pop_back() pop_front() push_back() push_front() resize() size() swap()
C++ <fstream>
filebuf fstream ifstream ofstream
C++ <iomanip>
setprecision() setw() setfill() setbase() setiosflags() resetiosflags() put_time() get_time() fixed scientific left right showpoint boolalpha
C++ <iostream>
cerr clog cin cout wcerr wclog wcin wcout
C++ <list>
back() begin() clear() empty() end() erase() front() insert() merge() pop_back() pop_front() push_back() push_front() remove() reverse() size() sort() unique()
C++ <map>
at() begin() clear() count() emplace() empty() end() erase() find() insert() lower_bound() rbegin() rend() size() swap() upper_bound()
C++ <memory>
unique_ptr shared_ptr weak_ptr make_shared() get() reset() release() use_count() lock() expired()
C++ <queue>
back() empty() front() pop() push() size() swap()
C++ <random>
random_device default_random_engine mt19937 uniform_int_distribution uniform_real_distribution normal_distribution bernoulli_distribution
C++ <set>
begin() clear() count() emplace() empty() end() erase() find() insert() lower_bound() rbegin() rend() size() swap() upper_bound()
C++ <sstream>
stringstream istringstream ostringstream str()
C++ <stack>
empty() pop() push() size() swap() top()
C++ <stdexcept>
logic_error domain_error invalid_argument length_error out_of_range runtime_error overflow_error range_error underflow_error exception what()
C++ <string>
append() at() back() begin() c_str() clear() compare() copy() data() empty() end() erase() find() front() insert() length() max_size() operator[] pop_back() push_back() replace() rfind() resize() size() substr() swap()
C++ <unordered_map>
at() begin() bucket_count() clear() count() emplace() empty() end() erase() find() insert() load_factor() operator[] reserve() size() swap()
C++ <unordered_set>
begin() bucket_count() clear() count() emplace() empty() end() erase() find() insert() load_factor() reserve() size() swap()
C++ <vector>
assign() at() back() begin() capacity() clear() data() empty() end() erase() front() insert() max_size() pop_back() push_back() rbegin() rend() reserve() resize() shrink_to_fit() size() swap()



C++ Online Compiler

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C++ Compiler (Editor)

With our online C++ compiler, you can edit C++ code, and view the result in your browser.

#include <iostream>
using namespace std;

int main() {
  cout << "Hello World!";
  return 0;
}
Hello World!
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  1. Click the "Try it Yourself" button to open the editor.
  2. Write or change the C++ code.
  3. Click "Run" to see the output.

If you don't know C++, we suggest that you read our C++ Tutorial from scratch.

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