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当我尝试将一些值复制到从主函数传递的 char 数组时，我遇到了段错误。
请找到附件中的代码示例，请帮助我哪里出错了。
#include <stdio.h>
#include <string.h>
void getVal(char val[]){
strcpy(val[0],"abcdef"); //segfault.
}
int main(int argc, char **argv)
{
char val[64] = { 0 };
getVal(&val[0]);
printf("%s",val);
}
发布了实际代码，当数组 strcpy 的 char 工作正常但通过函数调用时它给出了段错误。请帮助我。
#include <time.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include "ezxml.h"
static ezxml_t root;
void load_xml(char *root_node){
root = ezxml_parse_file(root_node);
printf("%p\n",root);
}
void getParamVal(char *objname, char val[]){
char *char_strip;
const char *tmp_buf[20];
int i=0;
ezxml_t get_child_tmp;
const char *attrvalue;
char_strip = strtok (objname,".");
while (char_strip != NULL)
{
tmp_buf[i] = char_strip;
char_strip = strtok (NULL, ".");
i++;
}
for (get_child_tmp = ezxml_child(root,tmp_buf[1]); get_child_tmp; get_child_tmp = get_child_tmp->next) {
attrvalue = ezxml_attr(get_child_tmp, "instance");
if(!(strcmp(attrvalue,tmp_buf[2]))){
ezxml_t get_child_level1;
for (get_child_level1 = ezxml_child(get_child_tmp,tmp_buf[3]); get_child_level1; get_child_level1 = get_child_level1->next) {
attrvalue = ezxml_attr(get_child_level1, "instance");
if(!(strcmp(attrvalue,tmp_buf[4]))){
ezxml_t get_child_level2;
for (get_child_level2 = ezxml_child(get_child_level1,tmp_buf[5]); get_child_level2; get_child_level2 = get_child_level2->next) {
attrvalue = ezxml_attr(get_child_level2,"instance");
if(!(strcmp(attrvalue,tmp_buf[6]))){
printf("%s\n",ezxml_child(get_child_level2,tmp_buf[7])->txt);
char s[10];
strcpy (s,ezxml_child(get_child_level2,tmp_buf[7])->txt); // fine with local array of char
printf("%s\n",s);
strcpy(val, ezxml_child(get_child_level2,tmp_buf[7])->txt); // problem gives segfault only diff is val is from other function.
}
}
}
}
}
}
}
int main(int argc, char **argv)
{
if (argc < 2){
printf("usage: ./test <xml file> ");
exit(1);
}
struct timeval tv;
unsigned int seconds=0, mseconds=0;
char val[64] = { 0 };
char objname[]="a.b.c.d.e.f.c";
load_xml(argv[1]);
gettimeofday(&tv, NULL);
seconds = tv.tv_sec;
mseconds = tv.tv_usec;
printf("START: [%u][%u]\n", seconds, mseconds);
getParamVal(&objname[0],&val[0]);
gettimeofday(&tv, NULL);
seconds = tv.tv_sec;
mseconds = tv.tv_usec;
printf(" END: [%u][%u]\n", seconds, mseconds);
return 0;
}