Otherwise, use an IF-THEN-ELSE statement. Example 复制 CASE Field OF Field::A: BEGIN x := x + 1; y := -y - 1; END; Field::B: x := y; Field::C,Field::D: y := x; ELSE BEGIN y := x; a := b; END; END Example The f
Within a do or a while statement, the next iteration starts by reevaluating the expression of the do or while statement. A continue statement in a for statement causes evaluation of the loop expression of the for statement. Then the code reevaluates the conditional expression. Depending on the...
What Does the “if” Statement in C Do? At its core, the “if” statement embodies a conditional mechanism that permits the execution of a code block exclusively when a particular condition holds true. This foundational framework propels programs to make decisions grounded in distinct situations,...
You can nest several WITH statements. If you have identical names, then the inner WITH statement overrules the outer WITH statement. Example This example shows two ways to write the same code that creates a record variable that you can commit later. ...
Code that sets up the context forifandwhileconstructs should be separated fromifandwhileby a blank line, unless the body ofifandwhileconsists of a single statement: package = strtok(buf,"\n");while(NULL != package){...package = strtok(NULL,"\n");} ...
while(conditional-expression) { nested-statements } /*For Loops*/ for(initialization; conditional-expression; increment) { nested-statements } /*Do-While Loops*/ do{ nested-statements }while(conditional-expression); Conditional Execution And Selection ...
switch statementis used to control the execution flow within a block of code. switch expressionis typically used in contexts of value return and value assignment, often as aexpression-bodied members. aswitch expressioncase section cannot be empty, aswitch statementcan. ...
目标代码生成(CodeGeneration):将优化后的中间代码翻译为目标机器的指令集,生成可执行文件。2.变量(Variable)在C语言中,变量是用来存储数据的一块内存空间。每个变量都有一个类型(如整型、字符型、浮点型等)以及一个唯一的标识符(变量名),通过变量名可以访问和修改其中存储的数据。在C语言中,变量的声明通常包括以下...
lint Source Code Checker This chapter explains how you can use the lint program to check your C code for errors that may cause a compilation failure or unexpected results at runtime. In many cases, lint warns you about incorrect, error-prone, or nonstandard code that the compiler does not...
ageage}elseif(age<21){printf("You need to be over 21\n");}else{printf("You are over 18 and older than 21 so you can continue \n");}} Output Run the code and check its output − You need to be over 18 years old to continue ...