• Not checking number and types of arguments when the function declaration has an empty parameter list.^ By declaring it with a variable number of arguments in the prototype.
  • Infrequently Asked Questions in comp.lang.c 10 February 2010 12:52 UTC www.seebs.net [Source type: FILTERED WITH BAYES]
  
  ^ Since K&R function declarations did not include any information about function arguments, function parameter type checks were not performed, although some compilers would issue a warning message if a local function was called with the wrong number of arguments, or if multiple calls to an external function used different numbers of arguments.
  • eIT 20 September 2009 4:54 UTC www.eit.in [Source type: Reference]
  
  ^ The sizeof function takes a type name as an argument and returns how much memory storage is required by that type.
  • C Programming 10 February 2010 12:52 UTC www.stat.washington.edu [Source type: Reference]
  
  (This provides backward compatibility with K&R C, which lacked prototypes.)
.
• Some questionable choices of operator precedence, as mentioned by Kernighan and Ritchie above, such as == binding more tightly than & and | in expressions like x & 1 == 0.
• The use of the = operator, used in mathematics for equality, to indicate assignment, following the precedent of Fortran, PL/I, and BASIC, but unlike ALGOL and its derivatives.^ In expressions free from assignment operation, the result is obtained in the following way: .
  • Chapter 2: Programming Microcontrollers - PIC Microcontrollers - Programming in C - Free Online Book - mikroElektronika 10 February 2010 12:52 UTC www.mikroe.com [Source type: Reference]
  
  ^ It looks like the multiplication operator, but you use it more.
  • Infrequently Asked Questions in comp.lang.c 10 February 2010 12:52 UTC www.seebs.net [Source type: FILTERED WITH BAYES]
  
  ^ Such criticisms fall into two broad classes: desirable operations that are too hard to achieve using unadorned C, and undesirable operations that are too easy to accidentally achieve while using C. Putting this another way, the safe, effective use of C requires more programmer skill, experience, effort, and care than is required for some other programming languages.
  • eIT 20 September 2009 4:54 UTC www.eit.in [Source type: Reference]
  
  .Ritchie made this syntax design decision consciously, based primarily on the argument that assignment occurs more often than comparison.
• Similarity of the assignment and equality operators (= and ==), making it easy to accidentally substitute one for the other.^ One operator makes it true, the other tests that truth.
  • Advogato: a thread on the c programming language 10 February 2010 12:52 UTC www.advogato.org [Source type: Original source]
  
  ^ Such criticisms fall into two broad classes: desirable operations that are too hard to achieve using unadorned C, and undesirable operations that are too easy to accidentally achieve while using C. Putting this another way, the safe, effective use of C requires more programmer skill, experience, effort, and care than is required for some other programming languages.
  • eIT 20 September 2009 4:54 UTC www.eit.in [Source type: Reference]
  
  ^ Well, to quote the Perl programmer's motto, "There's more than one way to do it."
  • Advogato: a thread on the c programming language 10 February 2010 12:52 UTC www.advogato.org [Source type: Original source]
  
  .C's weak type system permits each to be used in the context of the other without a compilation error (although some compilers produce warnings).^ Through the use of transaction pointers (a transaction is a structured two-way communication mechanism) and process variables, Concurrent C processes are able to communicate directly with other processes, regardless of the physical position of the processes in the system.
  • Parallel Programming Pattern Language: AnnotatedBibliography 10 February 2010 12:52 UTC www.cise.ufl.edu [Source type: Academic]
  
  ^ Casting it has no effect other than to hide possibly useful warnings.
  • Why C Is Not My Favourite Programming Language || kuro5hin.org 10 February 2010 12:52 UTC www.kuro5hin.org [Source type: FILTERED WITH BAYES]
  
  ^ In other words, a system language is something you would use to *create* Bourne shell, bash, etc.
  • Google’s Go: A New Programming Language That’s Python Meets C++ 10 February 2010 12:52 UTC www.techcrunch.com [Source type: General]
  
  .For example, the conditional expression in if (a=b) is only true if a is not zero after the assignment.^ In this case, the operation is executed at least once regardless of whether the condition is true or false as the expression check_condition is executed at the end of the loop.
  • Chapter 2: Programming Microcontrollers - PIC Microcontrollers - Programming in C - Free Online Book - mikroElektronika 10 February 2010 12:52 UTC www.mikroe.com [Source type: Reference]
  
  ^ Logic operators return true (logic 1) if the expression evaluates to non-zero, and false (logic 0) if the expression evaluates to zero.
  • Chapter 2: Programming Microcontrollers - PIC Microcontrollers - Programming in C - Free Online Book - mikroElektronika 10 February 2010 12:52 UTC www.mikroe.com [Source type: Reference]
  
  ^ One drawback of nested expression was the warning "assignment in conditional expression" with if(p = malloc(size)) .
  • C programming language coding guidelines 10 February 2010 12:52 UTC www.lrdev.com [Source type: Reference]
  
  ^[10]
.
• A lack of infix operators for complex objects, particularly for string operations, making programs which rely heavily on these operations (implemented as functions instead) somewhat difficult to read.
• A declaration syntax that some find unintuitive, particularly for function pointers.^ Which syntax makes it easier to find xyz?
  • Google’s Go: A New Programming Language That’s Python Meets C++ 10 February 2010 12:52 UTC www.techcrunch.com [Source type: General]
  
  ^ As for lack as what's implemented as functions as parts of the language..
  • Why C Is Not My Favourite Programming Language || kuro5hin.org 10 February 2010 12:52 UTC www.kuro5hin.org [Source type: FILTERED WITH BAYES]
  
  ^ The object interfaces provided by ILU hide implementation distinctions between different languages, between different address spaces, and between operating system types.
  • Programming Texts/Tutorials 10 February 2010 12:52 UTC stommel.tamu.edu [Source type: Academic]
  
  (Ritchie's idea was to declare identifiers in contexts resembling their use: "declaration reflects use".)

Operators

main()
{
    printf("hello, world
");
}

#include <stdio.h>
 
int main(void)
{
    printf("hello, world
");
    return 0;
}