c language function often need to pass through the two-dimensional array, there are three methods may be implemented as follows:
A method, parameter gives the length of the second dimension.
E.g:
#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]);
}
void main()
{
char* p[3];
char str[][5] = {"abc","def","ghi"};
func(3, str);
}
The second method parameter is declared as a pointer to an array.
E.g:
#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]);
}
void main()
{
char* p[3];
char str[][5] = {"abc","def","ghi"};
func(3, str);
}
Three methods parameter declared as a pointer to a pointer.
E.g:
#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]);
}
void 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);
}