if (expression) statement1 else if (expression) statement2 else if (expression) statement3 else if (expression) statement4 else statement5//处理一些意外情况,错误检验,可以省略不写。 3.2、Switch 类似于else-if选择语句,区别在于选择条件表达的取值不同 语法表示如下: switch (expression) //表达式必须...
It may appear anywhere in the body of the switch statement. A case or default label can only appear inside a switch statement.The type of switch expression and case constant-expression must be integral. The value of each case constant-expression must be unique within the statement body....
Theswitch-case statementacts as a compact alternative to cascade of if-else statements, particularly when the Boolean expression in "if" is based on the "=" operator. If there are more than one statements in anif(orelse) block, you must put them inside curly brackets. Hence, if your cod...
A case or default label can only appear inside a switch statement.The type of switch expression and case constant-expression must be integral. The value of each case constant-expression must be unique within the statement body.The case and default labels of the switch statement body are ...
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Crum, when I removed the "int x = 0;" in switch_utils.c line I got this in an if statement, and "x" is used in if, for, etc, examples: if (*p == '\n') { x++; if (x == 2) { src/switch_utils.c:147:3: error: use of undeclared identifier 'x' x++; ^ ...
If we do not use thebreakstatement, all statements after the matching label are also executed. Thedefaultclause inside theswitchstatement is optional. switch Statement Flowchart switch Statement Flowchart Example: Simple Calculator // Program to create a simple calculator#include<stdio.h>intmain(){ch...
Restoration of switch statement warnings A previous version of the compiler removed some warnings related to switch statements; these warnings have now been restored. The compiler now issues the restored warnings, and warnings related to specific cases (including the default case) are now issued on ...
if (a) { int32_t c, d; /* OK, c and d are in if-statement scope */ c = foo(); int32_t e; /* Wrong, there was already executable statement inside block */ } 用星号声明指针变量与类型对齐 /* OK */ char* a; /* Wrong */ ...