1：枚举里面的值是常量; 例如 enum color {red,orange,yellow};
2：枚举列表中的常量默认为0，1，2等等 例如 enum color {red,orange,yellow}; 常量值默认为0，1，2
3: 枚举列表常量值是可以指定的,且指定值后的枚举值将递增 例如enum color {red,orange=10,yellow}; yellow=11
4: 在C语言中枚举可以递增 运算符++,而C++中需要强制转换定义为int再运算符++
enum用法例子如下
#include<stdio.h>
#include<string.h>
enum specturm {red,orange,yellow,green,blue,violet};
const char *colors[]={"red","orange","yellow","green","blue","violet"};
#define LEN 30
int main(void)
{
char choice[LEN];
int color;
int color_is_found=0;
puts("Enter a color (empty line to quit): ");
while(gets(choice)!=NULL&&choice[0]!='\0')
{
for(color=red;color<=violet;color++)
{
if(strcmp(choice,colors[color])==0)
{
color_is_found=1;
break;
}
}
if(color_is_found)
switch(color)
{
case 0:puts("Roses are red");break;
case 1:puts("Poppies are orange");break;
case 2:puts("Sunflowers are yellow");break;
case 3: puts("Grass is green");break;
case 4:puts("Bluebells are blue");break;
case 5:puts("Violets are violet");break;
}
else printf("I don't know about the color %s.\n",choice);
color_is_found=0;
puts("Next color,please(empty line to quit): ");
}
puts("Goodbye!");
return 0;
}
此内容由惯性聚合(RSS阅读器)自动聚合整理，仅供阅读参考。 原文来自 — 版权归原作者所有。