Labels: text | screenshot | font OCR: The standard header file "stdio.h" contains the function prototype for "printf( )". It also contains the macro definitions for "getchar( )" and "putchar( )", which will be used to read characters from the keyboard and to write characters to the screen, respectively. The standard header file "ctype.h" contains the macro definition for "isalpha( )", which will be used to determine if a character "is alphabetic," that is, if it is a lower- or uppercase letter.
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