一.出现段错误
看下面两种写法
1.
#include
#include
struct item
{
char name[32];
char *value;
struct item *next;
};
int main()
{
char *channel,*start,*end;
struct item test;
snprintf(test.name,31,”%s”, “channel”);
test.value = (char *)malloc(128);
snprintf(test.value,127,”%s”,”1-15,17-31,43,55″);
if(!strcasecmp(test.name,”channel”))
{
while(channel = strsep(&test.value,”,”))
{
start = strsep(&channel,”-“);
if(channel)
{
end = channel;
printf(“include channel start from %s to %s/n”,start,end);
}
else
printf(“include channel %s/n”,start);
}
}
return 0;
}
2.写法2
#include
#include
struct item
{
char name[32];
char value[128];
struct item *next;
};
int main()
{
char *channel,*start,*end;
struct item test;
snprintf(test.name,31,”%s”, “channel”);
//test.value = (char *)malloc(128);
snprintf(test.value,127,”%s”,”1-15,17-31,43,55″);
if(!strcasecmp(test.name,”channel”))
{
while(channel = strsep(&test.value,”,”))
{
start = strsep(&channel,”-“);
if(channel)
{
end = channel;
printf(“include channel start from %s to %s/n”,start,end);
}
else
printf(“include channel %s/n”,start);
}
}
return 0;
}
段错误
二.下面的段错误
#include
#include
int main(void)
{
char *p,*str = “asd@123”; //old
printf(“len = %d/n”,strlen(str));
printf(“str = %c/n”,str[4]);
printf(“11/n”) ;
str[3]=’a’ ; //err
strcpy(str,”/0″) ; //err
printf(“len = %d/n”,strlen(str));
printf(“str = %c/n”,str[0]);
return 0;
}
三strsep的一个示例
#include
#include
int main()
{
char *ip = “192.168.0.1”;
char *tmp, *p;
tmp = ip;
tmp = (char *)malloc(100) ;
strcpy(tmp,ip) ;
//strncpy(tmp,99,ip)
while((p = strsep(&tmp, “.”)) != NULL)
{
printf(“%s/n”, p);
}
}
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