1 int arrays_common(int arrs[][10], int cnt,  int* res, int len_res )
 2 {
 3     int* index_arr = (int*)calloc(cnt, sizeof(int));         //cnt是第一维　数组的编号
 4     int common_cnt = 0 ;　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　//result中数组的下标
 5     int max_index ;
 6     int min_val ;
 7     int min_index ;
 8     int index ;
 9     while(1)
10     {
11         for(index = 0 ; index < cnt - 1; index ++)
12         {
13             if( arrs[index][index_arr[index]] != arrs[index + 1][index_arr[index + 1]] )
14             {
15                 break ;
16             }
17         }
18         if(index < cnt - 1)
19         {
20             min_index = 0 ;
21             min_val = arrs[0][index_arr[0]] ;
22             for(index = 1; index < cnt; index ++)
23             {
24                 if(arrs[index][index_arr[index]] < min_val)
25                 {
26                     min_index = index ;
27                     min_val = arrs[index][index_arr[index]] ;
28                 }
29             }
30             index_arr[min_index] ++ ;
31         }else
32         {
33             res[common_cnt] = arrs[0][index_arr[0]] ;
34             common_cnt ++ ;
35             for(index = 0 ; index < cnt; index ++)
36             {
37                 index_arr[index] ++ ;
38             }
39         }
40         for(max_index = 0, index = 1; index < cnt; index ++)
41         {
42             if(index_arr[index] > index_arr[max_index])
43             {
44                 max_index = index ;
45             }
46         }
47         if(index_arr[max_index] >= 10)
48         {
49             return common_cnt;
50         }
51     }
52 }

 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <stdlib.h>
 4
 5 int mycmp(int left,int right);
 6 int mycat(int left,int right);
 7 int mycpy(int left,int right);
 8 void func_1();
 9 void func_2();
10 void func_3();
11
12 int process(int a,int b,int (*pf)(int a,int b));
13
14 int main(int argc,char* argv)
15 {
16     /*
17     int a = 3;
18     int b = 4;
19     int res;
20     res = process(a,b,&mycmp);
21     printf("res: %d\n",res);
22     res = process(a,b,&mycat);
23     printf("res: %d\n",res);
24     res = process(a,b,&mycpy);
25     printf("res: %d\n",res);
26     */
27     int ch;
28     void (*p[4])() = {NULL,&func_1,&func_2,&func_3};
29     while(ch = getchar())
30     {
31         if(ch=='\n')
32             continue;
33         //system("cls");
34         (*p[ch - '0'])();
35     }
36     return 0;
37 }
38
39 int mycmp(int left,int right)
40 {
41     return left+right;
42 }
43 int mycat(int left,int right)
44 {
45     return left-right;
46 }
47 int mycpy(int left,int right)
48 {
49     return left*right;
50 }
51
52 int process(int a,int b,int (*pf)(int a,int b))
53 {
54     return (*pf)(a,b);
55 }
56
57 void func_1()
58 {
59     putchar('h');
60     putchar('\n');
61 }
62 void func_2()
63 {
64     putchar('y');
65     putchar('\n');
66 }
67 void func_3()
68 {
69     exit(1);
70 }