Save stdin Uppercased

Read every line from standard input until the input ends, convert each line to uppercase, and write the uppercased lines to the file input_copy.txt (create or truncate it; one line per input line, each followed by a newline). Then close the file, reopen input_copy.txt with an ifstream, and print every line it contains.

Example input:
hello
world

The output for that input is shown in Expected Output.

Expected Output:

HELLO↵
WORLD↵
MIXED CASE 123↵
ABC DEF↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Streamsofstream

Code Editor

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Your Output

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Test Cases

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