Help: Where can I find an article on data structures in English? 40

Receiving a simple calculator program requires input of affixed expressions, and outputs equivalent to the middle suffix expression and evaluation infix expression. Suppose the input may contain (floating) quantities, arithmetic operations +, - and , and within parentheses. However, expressions do not have to be fully parentheses, which are lost within the brackets, and are usually determined by the C+ precedence rule to determine the order of evaluation.

When an invalid infix expression is entered, then an error message will be printed and the user will be prompted again to enter a new sfix expression. The plan will continue until the user enters the key ('The mask has no expression. This is the introduction, 1.

Convert a valid suffix expression to the corresponding suffix expression and print to standard output (court).

2 。Evaluate the value of valid expressions and prints (courts).

3 。Error checking invalid fix expressions.

4 。STL stack level that must be used.

5 。compilable and running Manning.

6 。Follow the normal C+ precedence rule.

7 。Handle the two-number object cultivation code.

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June 26, 2000, two scientists, Franks. Collins and Clegg. Winter, announcing to the outside world that they have completely deciphered the "map of the human body":

dGenetic particles. Genetic particles are something that we all have, and it really tells our bodies what to do. The reason why the d-genetic material is that we resemble our parents is because we inherit from our parents a portion of their d-genetic particles.

People have been trying to understand our human body for a long time. 1860, George. Mandel reveals a special reason why we are so similar to the rest of the family.

This is the little thing that comes from what we have in our body called "genes". 1953, James. Watson and Franks.

Crick made other discoveries, and they found that the information that these little things really carried was written on the genetic particles in a special language.

Marshall, 1961. Nigerberg and John. Marsar found that genetic particles carry information that shows how genetic particles guide cell generation.

Scientists have discovered all the words on the genetic particle atlas, but they still don't know how they work. By understanding the meaning of a certain word, we can help people save more people from certain diseases.

Most people hope that this will help us make better medicines to help patients. Others fear that when people know more words and discover more information, they will misuse them, confuse people, or hinder the patient's ability to work. If the use of genetic technology is not controlled, people will face additional problems.

On June 26, 2000, scientists Francis Collins and Craig Venter announced to the world that DNA could now decipher the entire map of the human body. DNA is a substance in the human body that tells the body what to do. DNA is the reason why we look like our parents because we get a part of their DNA to make up our own.

For a long time, people have been trying to understand the human body. In 1860, Gregor Mendel discovered a particular reason – why we look like other people in the family. That's because we have a very small substance in our body called a gene.

In 1953, James Watson and Francis Crick made the discovery that they confirmed that the small pieces of information were written in a special language in the DNA. In 1961,

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