c语言 数组操作异常

Question

main函数接收子函数处理的数组，遍历数组时异常示例代码：#include#include#includevoiddemo(char*list[]){inti;charname[10];for(i=0;i

Answer 1

list=(char**)malloc(sizeof(char));
listonlypointtoamemoryareawhosesizeisonechar,that'sfarmorefromenough.Itwillcausesegmentfault
Thesolutionistoallocateenoughforlist:
constintN=200;//Nisthemaximuxlengthofeachstring
char**list=malloc(len*sizeof(char*));//Allocaterowpointers
for(i=0;i{
list[i]=malloc(N*sizeof(char));
}
...
//don'tforgetfree!
for(i=0;i{
free(list[i]);
}
free(list);
BTW,thearrayallocatedwiththeformofmallocisnot可变数组(variablelengtharray).