c++ cheat sheet

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                            // Comment to end of line
                            /* Multi-line comment */
#include  <stdio.h>         // Insert standard header file
#include "myfile.h"         // Insert file in current directory
#define X some text         // Replace X with some text
#define F(a,b) a+b          // Replace F(1,2) with 1+2
#define X \
 some text                  // Multiline definition
#undef X                    // Remove definition
#if defined(X)              // Conditional compilation (#ifdef X)
#else                       // Optional (#ifndef X or #if !defined(X))
#endif                      // Required after #if, #ifdef

Popularity 10/10 Helpfulness 1/10 Language cpp

Source: github.com

Tags: c++

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Contributed on Jul 26 2020

Eager Elk

0 Answers Avg Quality 2/10

C++ CHEAT SHEAT

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#include <future>         // Include future
function<int(int)> fib =  // Create lambda function
  [&](int i){
    if (i <= 1){
      return 1;
    }
    return fib(i-1) 
         + fib(i-2);
  };
future<int> fut =         // result of async function
  async(launch::async, fib, 4); // start async function in other thread
// do some other work 
cout << fut.get();        // get result of async function. Wait if needed.

Popularity 9/10 Helpfulness 1/10 Language cpp

Source: github.com

Tags: c++

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Contributed on Dec 29 2020

0 Answers Avg Quality 2/10

C++ CHEAT SHEAT

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int x;                      // Declare x to be an integer (value undefined)
int x=255;                  // Declare and initialize x to 255
short s; long l;            // Usually 16 or 32 bit integer (int may be either)
char c='a';                 // Usually 8 bit character
unsigned char u=255;
signed char s=-1;           // char might be either
unsigned long x =
  0xffffffffL;              // short, int, long are signed
float f; double d;          // Single or double precision real (never unsigned)
bool b=true;                // true or false, may also use int (1 or 0)

Popularity 8/10 Helpfulness 1/10 Language cpp

Source: github.com

Tags: c++

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Contributed on Dec 29 2020

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C++ CHEAT SHEAT

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#include<stdio.h>
# include<math.h>
	
	int main()
	{
int purchased, totalpay;
printf(“NOTE?/N);
printf(“If number of purchased is less that 10”
            “the price of each unit is $5/n”);
printf(“and if it is 10 or more than 10 it is $2\n\n”);
	printf(“Enter the number purchased item:”);
	scanf(“%d”, & purchased);
	if    (purchased >=10);
{
}
totalpay= purchased*2;
printf(“total: $%d”, totalpay);
{
}
totalpay= purchased*5;
printf(“total: $%”, totalpay);
}
Return 0;
	}

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Source: Grepper

Tags: c++

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Contributed on Mar 23 2022

Aaron Clyde Lauron

0 Answers Avg Quality 2/10

C++ CHEAT SHEAT

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#include<stdio.h>
# include<math.h>
	
	int main()
	{
int purchased, totalpay;
printf(“NOTE?/N);
printf(“If number of purchased is less that 10”
            “the price of each unit is $5/n”);
printf(“and if it is 10 or more than 10 it is $2\n\n”);
	printf(“Enter the number purchased item:”);
	scanf(“%d”, & purchased);
	if    (purchased >=10);
{
}
totalpay= purchased*2;
printf(“total: $%d”, totalpay);
{
}
totalpay= purchased*5;
printf(“total: $%”, totalpay);
}
Return 0;
	}

Popularity 1/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Mar 23 2022

Aaron Clyde Lauron

0 Answers Avg Quality 2/10

c++ cheat sheet

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-1

x=y;                        // Every expression is a statement
int x;                      // Declarations are statements
;                           // Empty statement
{                           // A block is a single statement
    int x;                  // Scope of x is from declaration to end of block
}
if (x) a;                   // If x is true (not 0), evaluate a
else if (y) b;              // If not x and y (optional, may be repeated)
else c;                     // If not x and not y (optional)

while (x) a;                // Repeat 0 or more times while x is true

for (x; y; z) a;            // Equivalent to: x; while(y) {a; z;}

for (x : y) a;              // Range-based for loop e.g.
                            // for (auto& x in someList) x.y();

do a; while (x);            // Equivalent to: a; while(x) a;

switch (x) {                // x must be int
    case X1: a;             // If x == X1 (must be a const), jump here
    case X2: b;             // Else if x == X2, jump here
    default: c;             // Else jump here (optional)
}
break;                      // Jump out of while, do, or for loop, or switch
continue;                   // Jump to bottom of while, do, or for loop
return x;                   // Return x from function to caller
try { a; }
catch (T t) { b; }          // If a throws a T, then jump here
catch (...) { c; }          // If a throws something else, jump here

Popularity 9/10 Helpfulness 1/10 Language cpp

Source: github.com

Tags: c++

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Contributed on Jul 26 2020

Eager Elk

0 Answers Avg Quality 2/10

c++ cheat sheet

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-1

255, 0377, 0xff             // Integers (decimal, octal, hex)
2147483647L, 0x7fffffffl    // Long (32-bit) integers
123.0, 1.23e2               // double (real) numbers
'a', '\141', '\x61'         // Character (literal, octal, hex)
'\n', '\\', '\'', '\"'      // Newline, backslash, single quote, double quote
"string\n"                  // Array of characters ending with newline and \0
"hello" "world"             // Concatenated strings
true, false                 // bool constants 1 and 0
nullptr                     // Pointer type with the address of 0

Popularity 9/10 Helpfulness 1/10 Language cpp

Source: github.com

Tags: c++

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Contributed on Jul 26 2020

Eager Elk

0 Answers Avg Quality 2/10

c++ cheat sheet

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