数据结构,联合和列举(Structures, Unions, and Enumerations)
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枚举类型(enum)例子
<![CDATA[
#include <stdio.h>
int main(void)
{
enum types {BLUE, BLACK, RED, YELLOW, WHITE} color;
int i, int2;
color = BLUE;
printf("color=>%d\n", color);
printf("BLACK=>%d\n", BLACK);
int2 = YELLOW;
printf("int2 =>%d\n", int2);
for (i=BLUE; i<=WHITE; i++)
printf("i=>%d\n", i);
return 0;
}
/*
执行结果
color=>0
BLACK=>1
int2 =>3
i=>0
i=>1
i=>2
i=>3
i=>4
*/
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数据结构程序例子
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#include <stdio.h>
#include <string.h>
struct jiage {
int dinjia;
int jianjia;
int yudai;
};
typedef struct goods {
char name[30];
struct jiage kakaku;
int kucun;
} goods;
int main(void)
{
goods syo;
goods *sp = &syo;
strcpy(syo.name,"PC486-3");
syo.kakaku.dinjia = 19000;
syo.kakaku.jianjia = 18000;
syo.kakaku.yudai = 17200;
syo.kucun = 136;
printf("GOODS :%s\n", sp->name);
printf("Dingjia:%d\n", sp->kakaku.dinjia);
printf("Jianjia:%d\n", sp->kakaku.jianjia);
printf("Yu--dai:%d\n", sp->kakaku.yudai);
printf("Ku--cun:%d\n", sp->kucun);
return 0;
}
/*
运行结果
GOODS :PC486-3
Dingjia:19000
Jianjia:18000
Yu--dai:17200
Ku--cun:136
*/
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<![CDATA[
以下两个宣言的区别是什么?
struct x1 {...};
typedef struct {...} x2;
前者是一个结构宣言;后者是一个"typedef"。
参照时,前者用"struct x1";后者用"x2"。
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<![CDATA[
#include <stdio.h>
typedef struct Styp {
char ss[80];
int nn;
} Styp;
struct Styp s1 = {"Test for typedef",100};
int main(void)
{
printf("s1 = %s\n", s1.ss);
printf("n1 = %i\n", s1.nn);
return 0;
}
/*
s1 = Test for typedef
n1 = 100
*/
]]>
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