Assume that a bool variable isquadrilateral has been declared , and that an int variable , numberofsides has been declared and initialized . write a statement that assigns the value of isquadrilateral to true if numberofsides is exactly 4 and false otherwise.

Afile named data. txt contains an unknown number of lines, each consisting of a single integer. write some code that creates two files, dataplus. txt and dataminus. txt, and copies all the lines of data1.txt that have positive integers to dataplus. txt, and all the lines of data1.txt that have negative integers to dataminus. txt. zeros are not copied anywhere.