数组之赋值

1、数组赋值问题

需要整体赋值时只可以在定义的同时整体赋值，或者用内存拷贝函数。

[b]正确：[/b]

[b]int a[10]={0,1,2,3,4,5,6,7,8,9};[/b]

char *week_day[8]=

{"sunday",

"monday",

"tuesday",

"wednesday",

"thursday",

"friday",

"saturday",

NULL

}; /* 说明指针数组。数组中的每个元素指向一个字符串 */

struct student

{

long num;

char name[20];

char sex;

char addr[20];

}；

struct student [b] students[3]={ {10101, "Li Lin", 'M', "Beijing"},{10102, "zhang", 'F', "shanghai"} …...};[/b]

struct

{

long num;

char name[20];

char sex;

char addr[20];

} [b] students[3]={ {10101, "Li Lin", 'M', "Beijing"},{10102, "zhang", 'F', "shanghai"} …...}；[/b]

[b]错误：[/b]



int a[10];

a[10]={0,1,2,3,4,5,6,7,8,9};

可以只给一部分元素赋值，[b]对全部数组元素赋值时可以不指定数组长度，[b] 但是，既不赋初值，也不指定长度是错误的。[/b][/b]

正确：

[b] int a[10]={5,8,7,6};后面没有赋值的元素值默认为0。[/b]

[b]
int a[10]={0,1,2,3,4,5,6,7,8,9};[/b]

[b]可以写成 int a[]={0,1,2,3,4,5,6,7,8,9};[/b]



char a[]="happy";

char a[]={"happy"}; 注意，因为字符串结尾自动加'\0',所以char a[]="happy";长度为6，不是5。

char a[]={'h','a','p','p','y'};注意，长度为5

char *week_day[8]；

char * week_day []=

{"sunday",

"monday",

"tuesday",

"wednesday",

"thursday",

"friday",

"saturday",

NULL

}；

int *p[10];//指针数组，含有10个指针元素

错误：

[b]int a[];

[/b]

[b][b]char *week_day[]；

[/b][/b]