这是我用C语言编写的源代码 我想用静态定义基本数据,在函数外面
#include <stdio.h>
typedef struct {
char * URI;
char * file;
} redirect_t;
typedef struct {
char * URI;
char * file;
long long content_length;
} content_t;
typedef struct {
content_t contents[10];
redirect_t redirects[10];
} host_t;
typedef struct {
unsigned max_requests;
host_t hosts[10];
} addr_t;
static addr_t addr_list[] = {
(addr_t) { 24,
{
(host_t) {
{
(content_t) { "URI" },
(content_t) { "URI2" },
(content_t) { "URI3" },
},
{
(redirect_t) { "URI5" },
(redirect_t) { "URI6" },
(redirect_t) { "URI7" },
}
}
}
}
};
int main() {
return 0;
}
但我得到(初始化元素不是常数)错误
这是我的编译结果
C:\Users\x\Documents\C Projects\untitled\main.c:27:26: error: initializer element is not constant
(host_t) {
^
C:\Users\x\Documents\C Projects\untitled\main.c:27:26: note: (near initialization for '(anonymous).hosts')
C:\Users\x\Documents\C Projects\untitled\main.c:25:18: error: initializer element is not constant
(addr_t) { 24,
^
C:\Users\x\Documents\C Projects\untitled\main.c:25:18: note: (near initialization for 'addr_list')
C:\Users\x\Documents\C Projects\untitled\main.c:25:9: error: initializer element is not constant
我知道我可以在函数中使用malloc
并将数据插入(addr_list)但我想直接插入它而不进行任何动态分配。问题是什么?为什么我会得到这样的错误!
答案 0 :(得分:1)
是的,以这种方式使用复合文字是非标准的,它们不被视为&#34;常数&#34;但对象。正确的工具是指定的初始化程序。例如,对于您的类型host_t
,初始化程序看起来像
{
.contents = { .URI = "URI", },
.redirects = { .URI = "URI5", },
},