我不太确定这两者之间有什么区别。我的教授写道“array与*array[]相同”，并且我们被演示了一个使用**array的例子（所以在课后，我尝试将其与*array[]交换，但它没有起作用），请问这两个是否真的如他所写？无论如何，这节课是关于动态内存分配的。
一旦我改变了双指针，这行代码就开始抛出错误。
lines = malloc(sizeof(char*));
还有一些其他地方需要重新分配内存。
@2 当然，这是整段代码
对于下面的评论，[]中没有任何内容，因为他的陈述是
**array = *array[]
大更新
很抱歉给您造成任何不便，我在写这篇文章的时候太累了，以下是完整的代码，没有做任何修改。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char **lines; // global text buffer, organized as an array of lines
// --------------------------------------------------------------------------------
// initialize global buffer
void initialize()
{
lines = malloc(sizeof(char*));
lines[0] = NULL;
}
// --------------------------------------------------------------------------------
// return number of lines in buffer
int countLines()
{
int count = 0;
while(lines[count++]) ;
return count-1;
}
// --------------------------------------------------------------------------------
// print one line
void printLine(int line)
{
printf("Line %d: %p %p %s\n",line, &lines[line], lines[line], lines[line]);
}
// --------------------------------------------------------------------------------
// print all lines
void printAll()
{
int num_lines = countLines();
int line = 0;
printf("----- %d line(s) ----\n",num_lines);
while (line < num_lines)
printLine(line++);
printf("---------------------\n");
}
// --------------------------------------------------------------------------------
// free whole buffer
void freeAll()
{
int line = countLines();
while (line >= 0)
free(lines[line--]);
free(lines);
}
// --------------------------------------------------------------------------------
// insert a line before the line specified
void insertLine(int line, char *str)
{
int num_lines = countLines();
// increase lines size by one line pointer:
lines = realloc(lines, (num_lines+2) * sizeof(char*));
// move line pointers backwards:
memmove(&lines[line+1], &lines[line], (num_lines-line+1)*sizeof(char*));
// insert the new line:
lines[line] = malloc(strlen(str)+1);
strcpy(lines[line],str);
}
// --------------------------------------------------------------------------------
// remove the specified line
void removeLine(int line)
{
int num_lines = countLines();
// free the memory used by this line:
free(lines[line]);
// move line pointers forward:
memmove(&lines[line], &lines[line+1], (num_lines-line+1)*sizeof(char*));
// decrease lines size by one line pointer:
lines = realloc(lines, num_lines * sizeof(char*));
}
// --------------------------------------------------------------------------------
// insert a string into specified line at specified column
void insertString(int line, int col, char *str)
{
// make room for the new string:
lines[line] = realloc(lines[line], strlen(lines[line])+strlen(str)+1);
// move characters after col to the end:
memmove(lines[line]+col+strlen(str), lines[line]+col, strlen(lines[line])-col);
// insert string (without terminating 0-byte):
memmove(lines[line]+col, str, strlen(str));
}
// --------------------------------------------------------------------------------
// MAIN program
int main()
{
initialize();
printAll();
insertLine(0,"Das ist");
printAll();
insertLine(1,"Text");
printAll();
insertLine(1,"ein");
printAll();
insertLine(2,"kurzer");
printAll();
printf("lines[2][4] = %c\n",lines[2][4]);
insertString(2,0,"ziemlich ");
printAll();
removeLine(2);
printAll();
freeAll();
return 0;
}