- Mid 1960s:
- Martin Richards developed BCPL (Basic Combined Progamming Language) as a simplification of CPL
- Late 1960s and early 1970s:
- Ken Thompson developed B (based on BCPL)
- B was used to develop the early versions of the UNIX operating system on the DEC PDP-7
- 1971:
- Dennis Ritchie began to extend B (most notably, adding a character type)
- He called the extended language NB (for "new B" and, perhaps, the Latin nota bene)
- Early 1970s:
- Dennis Ritchie started working on a language with more types and with type composition (similar to that in Algol)
- The name is either a progression through the alphabet or through the letters in BCPL (Ritchie himself won't say)
- Used to write the UNIX kernel for the PDP-11
- 1977-1978:
- C underwent extensive modifications
- The book The C Programming Language was written by Brian Kernighan and Dennis Ritchie
- 1983:
- ANSI began the process of standardizing C
- The standard was accepted by ISO in 1990
- 1980:
- Bjarne Stroustrup begain working on what he called "C-with-classes"
- He wanted to add the facilities for object-oriented programming contained in the SIMULA programming language to C
- 1983:
- Re-designed and re-named to C++
- Originally, C++ source code had to be "pre-compiled" (the pre-compiler converted C++ constructs to plain C)
- Mid to Late 1980s:
- The first commercial version of C++ was released in 1985
- In 1989 ISO began the standardization process (completed in 1998)
·
In C, C++
and Java
·
·
#include
< stdio.h >
·
·
int
main()
·
{
·
printf( "C Hello.\n" );
·
}
·
#include
<iostream>
·
·
int
main(void)
·
{
·
std::cout << "C++ Hello.\n";
·
·
return (0);
·
}
·
·
class
Hello {
·
public static void main( String[] argv )
·
{
·
System.out.print( "Hello.\n"
);
·
}
·
}
