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In C++, you must declare a variable before using it.

Find the output of the following code:

Write a C++ program to ask the user to input the electricity amount and calculate the total electricity bill by using the selection control structures according to the given condition: Round the numbers and keep only 2 decimal values, and use compound operators. From 0 to 40 electricity amount, multiply by 0.20 and display “The total electricity bill is =” From 41 to 50 electricity amount, multiply by 0.30 and display “The total electricity bill is =” From 51 to 60 electricity amount, multiply by 0.40 and display “The total electricity bill is =” Anything else display ” Invalid electricity data

All variables must be initialized before they are used, but not necessarily during declaration

A compiler: translates a program written in a high-level language into machine language 

 Semantic rules: rules that specify which statements (instructions) are legal or valid

The output of this code will be:

The logical AND operator (&&) returns true only if both operands are false.

An assembler translates a program written in assembly language into machine language

Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 23 m steps off his tree limb, and swings down and then up to Jane’s open arms. When he arrives, his vine makes an angle of 30o with the vertical with a speed of 9.00 m/s.  How high above Jane is Tarzan when he steps off the tree limb?