lab 7

who can solve this


c / c + + lab_7 (lines)
Enter a character string S1. perform the following steps:
a) build a new line of S2 [], excluding from S1 [] symbols: numbers, spaces and commas. Count the number of characters removed. give the result to the screen.
b) convert the received in paragraph
a) line S2 [] to string S3 [], double the upper (large) letters.
c) remove all occurrences of the string if not set character.
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