void _DT_INIT(void)

{
  __gmon_start__();
  return;
}



void FUN_00101020(void)

{
                    // WARNING: Treating indirect jump as call
  (*(code *)(undefined *)0x0)();
  return;
}



// WARNING: Unknown calling convention -- yet parameter storage is locked

void free(void *__ptr)

{
  free(__ptr);
  return;
}



// WARNING: Unknown calling convention -- yet parameter storage is locked

int puts(char *__s)

{
  int iVar1;
  
  iVar1 = puts(__s);
  return iVar1;
}



// WARNING: Unknown calling convention -- yet parameter storage is locked

size_t strlen(char *__s)

{
  size_t sVar1;
  
  sVar1 = strlen(__s);
  return sVar1;
}



// WARNING: Unknown calling convention -- yet parameter storage is locked

int printf(char *__format,...)

{
  int iVar1;
  
  iVar1 = printf(__format);
  return iVar1;
}



// WARNING: Unknown calling convention -- yet parameter storage is locked

void * malloc(size_t __size)

{
  void *pvVar1;
  
  pvVar1 = malloc(__size);
  return pvVar1;
}



void __cxa_finalize(void)

{
  __cxa_finalize();
  return;
}



void processEntry entry(undefined8 param_1,undefined8 param_2)

{
  undefined auStack_8 [8];
  
  __libc_start_main(FUN_00101179,param_2,&stack0x00000008,0,0,param_1,auStack_8);
  do {
                    // WARNING: Do nothing block with infinite loop
  } while( true );
}



// WARNING: Removing unreachable block (ram,0x001010d3)
// WARNING: Removing unreachable block (ram,0x001010df)

void FUN_001010c0(void)

{
  return;
}



// WARNING: Removing unreachable block (ram,0x00101114)
// WARNING: Removing unreachable block (ram,0x00101120)

void FUN_001010f0(void)

{
  return;
}



void _FINI_0(void)

{
  if (DAT_00104038 != '\0') {
    return;
  }
  __cxa_finalize(PTR_LOOP_00104030);
  FUN_001010c0();
  DAT_00104038 = 1;
  return;
}



void _INIT_0(void)

{
  FUN_001010f0();
  return;
}



undefined8 FUN_00101179(int param_1,undefined8 *param_2)

{
  undefined8 uVar1;
  size_t sVar2;
  char *__ptr;
  int local_1c;
  
  if (param_1 == 2) {
    sVar2 = strlen((char *)param_2[1]);
    if (sVar2 == 0x20) {
      sVar2 = strlen((char *)param_2[1]);
      __ptr = (char *)malloc(sVar2 >> 1);
      for (local_1c = 0; sVar2 = strlen((char *)param_2[1]), (ulong)(long)local_1c < sVar2 >> 1;
          local_1c = local_1c + 1) {
        __ptr[local_1c] = *(char *)((long)local_1c + param_2[1]);
      }
      if ((((((*__ptr == '8') && (__ptr[1] == '8')) && (__ptr[2] == '6')) &&
           (((__ptr[3] == 'f' && (__ptr[4] == '4')) &&
            ((__ptr[5] == '0' && ((__ptr[6] == '9' && (__ptr[7] == 'a')))))))) &&
          ((__ptr[8] == '3' && (((__ptr[9] == '7' && (__ptr[10] == 'b')) && (__ptr[0xb] == '4'))))))
         && (((__ptr[0xc] == 'd' && (__ptr[0xd] == '1')) &&
             ((__ptr[0xe] == 'd' && (__ptr[0xf] == '6')))))) {
        puts("[*] First Segment passed!!!");
        if ((((*(char *)(param_2[1] + 0x10) == '9') && (*(char *)(param_2[1] + 0x11) == '1')) &&
            ((*(char *)(param_2[1] + 0x12) == 'f' &&
             ((((*(char *)(param_2[1] + 0x13) == '7' && (*(char *)(param_2[1] + 0x14) == '1')) &&
               (*(char *)(param_2[1] + 0x15) == '0')) &&
              ((*(char *)(param_2[1] + 0x16) == '4' && (*(char *)(param_2[1] + 0x17) == '1'))))))))
           && (((*(char *)(param_2[1] + 0x18) == '7' &&
                ((*(char *)(param_2[1] + 0x19) == '8' && (*(char *)(param_2[1] + 0x1a) == '2')))) &&
               (((*(char *)(param_2[1] + 0x1b) == '8' &&
                 (((*(char *)(param_2[1] + 0x1c) == '5' && (*(char *)(param_2[1] + 0x1d) == '1')) &&
                  (*(char *)(param_2[1] + 0x1e) == '6')))) && (*(char *)(param_2[1] + 0x1f) == '2'))
               )))) {
          puts("[*] Last Segment passwd!!!");
          printf("FLAG: WSIR{%s}\n",param_2[1]);
          free(__ptr);
          uVar1 = 0;
        }
        else {
          puts("[-] Last Segment not passed!!!");
          uVar1 = 0xfffffffe;
        }
      }
      else {
        puts("[-] First Segment not passed!!!");
        uVar1 = 0xffffffff;
      }
    }
    else {
      puts("Incorrect!!!");
      uVar1 = 0xfffffffd;
    }
  }
  else {
    printf("Usage: %s PASSWORD",*param_2);
    uVar1 = 0xffffffff;
  }
  return uVar1;
}



void _DT_FINI(void)

{
  return;
}

 

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

  1. Library Functions:

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

  1. 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
}