二维数组参数传递

方法1：形参给出第二维的长度

 

#include <stdio.h>

void func(int n, char str[][5])
{
           int i;
           for (i = 0; i < n; i++)
           {
                   printf("\nstr[%d] = %s\n", i, str[i]);
           }
}

int main()
{
           char str[][5] = {"abc", "def", "ghi"};
           func(3, str);
           return 0;
}


 

方法2：形参声明为指向数组的指针

#include <stdio.h>

void func(int n, char (*str)[5])
{
           int i;
           for (i = 0; i < n; i++)
           {
                   printf("\nstr[%d] = %s\n", i, str[i]);
           }
}

int main()
{
           char str[][5] = {"abc", "def", "ghi"};
           func(3, str);
           return 0;
}


 

方法3：形参声明为指针的指针，实参传递指针数组

#include <stdio.h>

void func(int n, char **str)
{
           int i;
           for (i = 0; i < n; i++)
           {
                   printf("\nstr[%d] = %s\n", i, str[i]);
           }
}

int main()
{
           char *p[3];
           char str[][5] = {"abc", "def", "ghi"};
           p[0] = &str[0][0];
           p[1] = str[1];
           p[2] = str[2];
           func(3, p);
           return 0;
}


 

方法4：形参声明为指向指针的指针，并对参数进行强制转换

#include <stdio.h>

void func(int n, char **str, int m)
{
           int i;
           char (*p)[m] = (char (*)[m])str;
           for (i = 0; i < n; i++)
           {
                   printf("\nstr[%d] = %s\n", i, p[i]);
           }
}

int main()
{
           char str[3][5] = {"abc", "def", "ghi"};
           func(3, (char**)str, 5);
           return 0;
}