// switch_statement2.cpp // C2360 expected #include <iostream> using namespace std; int main(int argc, char *argv[]) { switch( tolower( *argv[1] ) ) { // Error. Unreachable declaration. char szChEntered[] = "Character entered was: "; case 'a' : { // Declaration of szChEnte...
The expression used in a switch statement must have an integral or enumerated type, or be of a class type in which the class has a single conversion function to an integral or enumerated type. You can have any number of case statements within a switch. Each case is followed by the value...
switch-statement: switch ( expression ) switch-block switch-block: { switch-sectionsopt } switch-sections: switch-section switch-sections switch-section switch-section: switch-labels statement-list switch-labels: switch-label switch-labels switch-label switch-label: case constant-expression : default ...
The body of a switch statement may have an arbitrary number of case: labels, as long as the values of all constant-expressions are unique (after conversion to the promoted type of expression). At most one default: label may be present (although nested switch statements may use their own ...
Flowchart of C++ switch...case statement Example: Create a Calculator using the switch Statement // Program to build a simple calculator using switch Statement#include<iostream>usingnamespacestd;intmain(){charoper;floatnum1, num2;cout<<"Enter an operator (+, -, *, /): ";cin>> oper;cout...
C++ 中 switch 语句的语法:switch(expression){ case constant-expression : statement(s); break; // 可选的 case constant-expression : statement(s); break; // 可选的 // 您可以有任意数量的 case 语句 default : // 可选的 statement(s); }switch 语句必须遵循下面的规则:...
switch ( 表达式 ) 语句 表达式 - 任何整数类型( char 、有符号或无符号整数,或枚举)表达式 语句 - 任何语句(典型为复合语句)。允许在 语句 中有case: 和default: 标号,而 break; 语句拥有特殊含义。 case 常量表达式 : 语句 (1) default : 语句 (2) 常量表达式 - 任何整数常量表达式 解释 switc...
这里使用 cppreference 的例子：switch statement 错误示例：switch(1){case1:intx=0;// 初始化std::...
C++ Switch Statements Use theswitchstatement to select one of many code blocks to be executed. Syntax switch(expression) { casex: // code block break; casey: // code block break; default: // code block } This is how it works: Theswitchexpression is evaluated once...
这里使用 cppreference 的例子：switch statement 错误示例：switch(1){case1:intx=0;// 初始化std::...