120 Control Structures: Part 1 Chapter 4 such (Affordable web design)
120 Control Structures: Part 1 Chapter 4 such initialization normally occurs in assignment statements. Notice the use of the nested if/else structure (lines 21 25) in the while structure s body. Also, notice the new statement at line 31 that uses Console.WriteLine to output a blank line. Software Engineering Observation 4.7 The most difficult part of solving a problem on a computer is developing the algorithm for the solution. Once a correct algorithm has been specified, the process of producing a working C# program from the algorithm is normally straightforward. Software Engineering Observation 4.8 Many experienced programmers write programs without ever using program development tools like pseudocode. These programmers feel that their ultimate goal is to solve the problem on a computer, and that writing pseudocode merely delays the production of final output. Although this may work for simple and familiar problems, it can lead to serious problems on large, complex projects. 4.11 Assignment Operators C# provides several assignment operators for abbreviating assignment expressions. For example, the statement c = c + 3; can be abbreviated with the addition assignment operator += as c += 3; The += operator adds the value of the expression on the right of the operator to the value of the variable on the left of the operator and stores the result in the variable on the left of the operator. Any statement of the form variable = variable operator expression; where operator is one of the binary operators +, -, *, / or % (or others we will discuss later in the book), can be written in the form variable operator= expression; Figure 4.12 includes the arithmetic assignment operators, sample expressions using these operators and explanations. Common Programming Error 4.9 Placing a space character between symbols that compose an arithmetic assignment operator is a syntax error. Assignment operator Sample expression Explanation Assigns Assume: int c =3, d = 5, e = 4, f = 6, g = 12; += c += 7 c = c + 7 10to c Fig. 4.12 Arithmetic assignment operators. (Part 1 of 2.)
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