Toupper (converts lowercase letters to uppercase letters)

/* Toupper (converts lowercase letters to uppercase letters) related functions: isalpha, tolower header file # include <ctype. h> defines the int toupper (INT c) function. It indicates that if the parameter C is a lowercase letter, the uppercase letter of the ing is returned. Return the converted uppercase letter. If no conversion is required, the C value is returned. Additional instructions example * // * converts lowercase letters in the S string to uppercase letters */# include <ctype. h> main () {char s [] = "abcdefgh12345 ;! # $ "; Int I; printf (" before toupper (): % s \ n ", S); for (I = 0; I <sizeof (s ); I ++) s [I] = toupper (s [I]); printf ("after toupper (): % s \ n", S );} /* execute before toupper (): abcdefgh12345 ;! # $ After toupper (): abcdefgh12345 ;! # $ */

 

Toupper (converts lowercase letters to uppercase letters)