我正在尝试运行以下代码(在fedora 11 i586上的gcc 4.3中):
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
struct s_smallstruct{
int smallstruct;
};
struct s_test2{
char * test2;
struct s_smallstruct* smallstruct;
};
struct s_test3{
char * test3;
struct s_smallstruct * smallstruct;
};
struct s_test1{
char * test1;
struct s_test2 * test2;
struct s_test3 * test3;
};
int main(){
struct s_test1 *test1 = (struct s_test1 *) malloc( sizeof test1 );
test1->test2[0].smallstruct[0].smallstruct = 123;
int num = test1->test2[0].smallstruct[0].smallstruct;
// struct s_smallstruct * smallstruct = (struct s_smallstruct *) malloc( sizeof smallstruct );
// smallstruct[0].smallstruct =12;
// int num = smallstruct[0].smallstruct;
printf( "%d\n" , num );
return EXIT_SUCCESS;
}
但是在 test1->test2[0].smallstruct[0].smallstruct = 123; 处发生了段错误。被注释的部分没有错误。这种行为的原因是什么。我对C语言不是很熟练,所以希望得到任何帮助。