c_题目_练习（C_ _ practice topic）.docVIP

c_题目_练习（C_ _ practice topic） C# programming - programming questions (computer operation problems) 1, from the keyboard to enter a positive integer, according to the reverse order of digital output. //2, from the keyboard input two integers, by the user to answer their sum, difference, product, quotient and residual computing results, and statistics the number of correct answers. 3, write a for statement, counting the condition of N, from 100~200, step 2, and then use the while statement to achieve the same cycle. 4, write a program, run to the user to ask how many points did you take? (0~100) after receiving input, determine its level and show it. The judgment follows: Excellent grade ={(90~100); and (80~89); in (60~69); difference (0~59);} 5, enter an integer, you will reverse the output figures. 6, use exhaustive method, and use for, while, do respectively... The while loop statement finds the prime number between 1~100. 7, find all the 1~1000 can be divided by 7 of the number, and calculate and output every 5 sum. 8, write a console program, respectively, between the output of 1~100 square, square root, natural logarithm, e index mathematical table. 9. Design a class that contains multiple constructors, and instantiate objects with these constructors. 10, the preparation of a rectangle class, private data members held a long (len) and width (wid), len and wid will be no argument constructor is set to 0, there is the constructor and the value, in addition, the class also includes a rectangular perimeter, area, length, held long rectangle the width of the rectangle, rectangle, modify the length and width of the corresponding parameter values and other public methods. 11, write a class Cal1, to achieve plus, minus two kinds of operations, and then write another derivative class Cal2, to achieve multiplication and division of the two operations. 12, establish three categories: named, adult, officials. Residents include ID number, name, date of birth, and adults inher