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 Using I/O Operations   All programming languages allow to read input (known as input operations) and to write output (known as output operations). Input/Output operations are more popularly known as I/O operations. The C language does not have any built-in statement to perform input and output operation. C language does not have any built-in statement to perform input and output operation. These data input and output operations are carried out by the standard input/output built-in library functions. So far we have used scanf() as a standard input and printf() as a standard output function in our programs. I/O operations using functions like getchar), getch(), getso, scanfo, printf(), putcharo, putc(), puts(), etc. To use any inbuilt function from C library, we have to include respective library of that function in the beginning of program using #include statement. #include<stdio.h> The name stdio.h stands for standard input-output header file. This header file contains various i