Write a C program to find the number of digits, uppercase and lowercase letters in a sentence entered by the user.

Define and use the following function for this job and print the results in main:

void howManyUL( const char *, int *, int *, int * );

EXAMPLE OUTPUT :

Enter a sentence: C645 is a LAB course

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Number of digits = 3

Number of upper case letters = 4

Number of lower case letters = 9