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It has nothing to do with C-language, it simply means that when you press a key representing a character, the character appears on the screen.
write a program to print A to Z on screen in c?
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In the programming language C++, cin is used to input the variable and cout is used to print a certain message or result.
this is a tricky one... press alt + f4 and see if that works.
Function 'clrscr' is not part of the C language. Or the standard libraries. It is MS-DOS specific function, use the help for details (clrscr means clear the screen).
C languages are often based originally on the C language but no longer adhere to it's tenets: often they supersede the original ANSI-92 C language. C++, Objective C, C-, and C# are often used derivatives of the C language. In almost all cases, plain C language can be used with a C language derivative and you get the same result as if you ran it through a plain old C compiler; but the C languages compilers have extra function and procedures available for the programmer.
C is a programming language. Its rules describe how programmers specify commands to the computer. For example, the following is a line of C code that displays hello on the screen: printf("Hello"); You can contrast the above with the following, which is how C++ code displays hello on the screen: cout << "Hello"; A compiler is a program that translates text the programmer writes into machine code... which is the language understood by the internal hardware of the computer. There are many C compilers on the market, including: GNU C, Microsoft Visual C++ (which can compile C), etc.
C-language was derived from B-language.
It is switch-case. Example: switch (opsign) { case '+': . result = a + b; . break; case '-': . result = a - b; . break; ... default: . printf ("opsign=%c unknown\n", opsign); }
language before c language is pascal