Reading a character in #C (module 14)

In this section we will discuss on reading a character using many inbuilt #C functions like scanf, getchar() etc.

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This is the 14th module on learning C with us. Earlier we discussed on the basic introduction and structure of C, preprocessor it's features, intermediate and executable codes. compilation and execution process of a C program. And keywords and identifiers, data types, variables and constants, scope of variables, operators and expressions in C. Type casting in #C.

In this section we will discuss on reading a character using inbuilt #C functions like scanf, getchar, getch,getche.

Reading a character :-

The simplest of all input/output operations is reading a character from the 'standard input unit (usual the keyboard) and writing it to the standard output unit (usually the screen).

Reading a single character can be done by using the function getchar. This can also be done with the help of the scanf function.

The getchar takes the following form:

variable_name = getchar();

variable_name is a valid C name that has been declared as char type. When this statement encountered, the computer waits until a key is pressed and then assigns this character as a value to getchar function. Since getchar is used on the right-hand side of an assignment statement the character value of getchar is in turn assigned to the variable name on the left.

For example :

char name;

Input :

#include
main()
{ char answer;
printf("Would you like to know my name?n");
printf("Type Y for YES and N for NO: ");
answer = getchar (): /* ..Reading a character... */
if(answer == 'y' ||answer =='Y')
printf("\n\nMy name is BUSY BEE n");
else
printf("\n\nYou are good for nothing\n");
}

Output :

Would you like to know my name?
Type Y for YES and N for NO: Y
My name is BUSY BEE
Would you like to know my name?
Type Y for YES and N for NO: n
You are good for nothing

In next module we will discuss on writing a character. For more information please be updated with us only on Www.newsandstory.

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