字符数组的初始化:
char a[6] = "hello1";// char b[6] = {'h','e','l','l','o','2',0}; char c[] = "hello3";//c字符:h,e,l,l,o,3,\0 char d[] ={'h','e','l','l','o','4','\0'};//d字符:h,e,l,l,o,4,\0 strcpy(a,b); //以\0为结束字符,但a,b空间仅保存前6个字符,无保存最后\0字符。故会将b之后的字符拷贝到a字符数组中。将会修改到a字符数组空间之后信息,导致程序崩溃 printf("%s\n",a);