4.12 Use different scan sequences to scan the data on the same side of the array.

Multiple scanning methods to access this data

2, 3, 4,  5,
   8, 9, 10,
     14, 15,
         20

#include <stdio.h>intMainvoid){    intarr[5][5] = {1,2,3,4,5,                      6,7,8,9,Ten,                      One, A, -, -, the,                      -, -, -, +, -,                      +, A, at, -, - }; inti,j;#if1 for(i=0;i<5; i++)    {         for(j=0;j<5; j + +) {printf ("%d%d", i,j); //printf ("%3d", Arr[i][j]);} putchar (Ten); } Putchar (Ten);#endif#if0//scanning mode transverse sweep 1.1:2,3,4,5,8,9,10,14,15,20#endif#if0//scanning mode transverse sweep 1.2:5,4,3,2,10,9,8,15,14,20#endif#if0//scanning mode transverse sweep 1.3:20,14,15,8,9,10,2,3,4,5#endif#if0//scanning mode transverse sweep 1.4:20,15,14,10,9,8,5,4,3,2#endif#if0//scanning mode vertical sweep 2.1:2,3,8,4,9,14,5,10,15,20#endif#if0//scanning mode vertical sweep 2.2:5,10,15,20,4.9,14,3,8,2#endif#if0//scanning mode vertical sweep 2.3:2,8,3,14,9,4,20,15,10,5#endif#if0//scanning mode vertical sweep 2.4:20,15,10,5,14,9,4,8,3,2#endif#if1//scan the way obliquely sweep 3.1:2,8,14,20,3,9,15,4,10,5    //Method 1 Recommended    intZ;  for(i=0, j=1;j<5; j + +)    {         for(z =0;z+i<5&&z+j<5; z++) {printf ("%3d", arr[z+i][z+J]); }} putchar (Ten); //Method 2 The law of reputation, actually have dine suspicion     for(j=1;j<5; j + +)    {         for(i=0;i<5-j;i++) {printf ("%3d", arr[i][j+i]); }} putchar (Ten);#endif#if0//scan the way obliquely sweep 3.2:5,4,10,3,9,15,2,8,14,20#endif#if0//scanning way oblique sweep 3.3:2,3,4,8,5,9,10,14,15,20 too hard not to. #endif}

4.12 Use different scan sequences to scan the data on the same side of the array.