今天好累，來休息一下

#include <stdio.h>
#include <stdlib.h>

void f1(int x[]) {
printf("in function f1\n");
int i;
for (i = 0; i < 10; i++) {
printf("x[%d] = ", i);
//printf("%d\t", x[i]);
//printf("%d\n", *(x+i));
printf("%d\n", *(x++));
}
}

void f2(int *x[]) { // how to get the dimention
int i, j;
for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++) {
printf("%d\t", x[i][j]);
printf("%d\n", *(*(x+i)+j));
}
}
}

void f3(int *x) { // how to get the dimention
int i, j;
for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++) {
printf("%d\n", x[i * 4 + j]); // how to get the number 4?
printf("%d\n", *(x + i * 4 + j));
}
}
}

int main(int argc, char *argv[])
{
int a[10];
int b[3][4];
int i, j;
int *p, **q, **r;
int *bp[3];

int *da;
da = malloc(10 * sizeof(int));

// 1D
for (i = 0; i < 10; i++) {
a[i] = i + 10;
}

p = (int *)a;
//printf("a = %d\n", a);
//printf("a = %d\n", p);
//printf("a = %d\n", ++a); // compile error
//printf("a = %d\n", ++p);

//for (i = 0; i < 10; i++) {
// printf("a[%d] = ", i);
// printf("%d\t", a[i]);
// printf("%d\t", *(a+i));
// printf("%d\t", p[i]);
// printf("%d\t", *(p+i));
//}

f1(a);
f1(p);

// 2D
for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++) {
b[i][j] = i + j;
}
}

r = (int **)b;

p = (int *)b;
bp[0] = b[0];
bp[1] = b[1];
bp[2] = b[2];

q = (int **) bp;

for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++) {
printf("b[%d][%d] = ", i, j);
printf("%d\t", b[i][j]);
printf("%d\t", *(*(b+i)+j));
//printf("%d\t", r[i][j]); //runtime bus error, core dump
//printf("%d\t", *(*(r+i)+j)); //runtime bus error, core dump
printf("%d\t", bp[i][j]);
printf("%d\t", *(*(bp+i)+j));
printf("%d\t", q[i][j]);
printf("%d\t", *(*(q+i)+j));

printf("%d\n", *(p+i*4+j));
}
}
f2(q);
f2(bp);
// f2(b); //runtime bus error, core dump
f3(p);
f3((int *)b);

system("PAUSE");
return 0;
}