C语言中,未指定长度的数组声明时,可以依据初始值列表来确定数组长度吗？ c语言中定义数组的时候可不可以缺省数组长度 ，在用户输入任意...
c\u8bed\u8a00\u4e2d\u6ca1\u6709\u5b9a\u4e49\u957f\u5ea6\u7684\u6570\u7ec4\u53ef\u4ee5\u76f4\u63a5\u521d\u59cb\u5316\u4e3a0\u5417\uff1f\u6bd4\u5982int a[]={0}\u53ef\u4ee5\uff0cc\u8bed\u8a00\u4e2d\u65e0\u957f\u5ea6\u6570\u7ec4\u5728\u58f0\u660e\u65f6\uff0c\u4e00\u5b9a\u8981\u8d4b\u521d\u503c\uff0c\u7cfb\u7edf\u6839\u636e\u6570\u636e\u7684\u591a\u5c11\u81ea\u52a8\u5b9a\u4e49\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u5f53\u7136\u4e5f\u53ef\u4ee5\u8d4b0\u503c\uff0c\u4f46\u4e5f\u53ea\u6709\u4e00\u4e2a\u5143\u7d20\uff0c\u7c7b\u4f3c\u4e8eint a[1]\uff0ca[0]={0}\u3002
\uff081\uff09\u4f60\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u957f\u5ea6\u957f\u4e8e\u9700\u8981\u7684\u6570\u7ec4\uff0c\u4f8b\u5982\uff1a char str[500];
\u6216\u8005 \uff082\uff09\u8fd0\u884c\u65f6\uff0c\u8f93\u5165\u957f\u5ea6\uff0c\u505a\u52a8\u6001\u5206\u914d\uff0c\u518d\u8f93\u5165\u6570\u636e \uff0c\u4f8b\u5982\uff1a
char *str; int n;
printf("input length n: "); scanf("%d",&n);
str = malloc(sizeof(char) * n);
\u6216\u8005 \u4e0d\u77e5\u9053\u957f\u5ea6\uff0c\u5b8c\u5168\u968f\u673a\uff0c \u90a3\u4e48 (3) \u7528 realloc \u53cd\u590d\u52a8\u6001\u5206\u914d\u3002\u8fd9\u4e2a\u8f83\u7e41\u9501\uff0c\u4f60\u53ef\u53c2\u8003\u4e0b\u9762\u7684 \u6574\u578b\u6570\u7ec4\u5206\u914d\u6cd5\uff0c\u505a\u4f60\u7684 char \u6570\u7ec4 \u6216 \u522b\u7684\u6570\u7ec4\u7684 \u53cd\u590d\u52a8\u6001\u5206\u914d\u3002
#include
#include /* realloc, free, exit, NULL */
intmain ()
{
int input,n;
int count = 0;
int *numbers = NULL; //\u52a8\u6001\u6570\u7ec4
int *more_numbers = NULL;
do{
printf ("Enter an integer value (0 to end): ");
scanf ("%d", &input); //\u8f93\u5165\u4e00\u4e2a\u6570
count++; // \u8ba1\u6570\u5668\uff0c\u6570\u7684\u4e2a\u6570
more_numbers = (int*) realloc (numbers, count *sizeof(int)); //\u5206\u914d\uff0c\u589e\u52a0\u5185\u5b58
if(more_numbers!=NULL) { //\u68c0\u67e5\u662f\u5426\u5206\u914d\u6210\u529f
numbers=more_numbers;
numbers[count-1]=input;
}
else{
free (numbers);
puts ("Error (re)allocating memory");
exit (1);
}
}while(input!=0); //\u5faa\u73af
printf ("Numbers entered: ");
for(n=0;n<count;n++) printf ("%d ",numbers[n]);
free (numbers);
return0;
}
比如unsigned char array[]={12,34,56};虽然没有指定长度，系统仍会给array分配3个字节的空间，通过sizeof(array)计算得到的结果也是3。
请采纳，谢谢
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