C$++$ ONLY PLEASE

Predict the output, and explain your answer briefly or with a diagram $(2$ pts each $)$

$(3$pts$)$ Given the following c$-$string, write a function that capitalizes all the letters.

char str $[81]=$ "hello world!"

after calling your function, str becomes:

$$HELLO WORLD!"

void capitalize$\_$str $($char $*$str$)$

$\{$