1 #include <stdio.h>
2 #include <
string.h>
3 int cha_num(
char *
buff)
4 {
5 int i, j;
6 int len =
strlen(buff);
7 int count =
0;
8 int flag =
0;
9 for(i =
0; i < len; i++
)
10 {
11 flag =
1;
12 if(buff[i] >=
0 && buff[i] <=
127)
13 {
14 for(j = i +
1; j < len; j++
)
15 {
16 if(buff[i] ==
buff[j])
17 {
18 flag =
0;
19 break;
20 }
21 }
22 if(flag)
23 count++
;
24
25 }
26 }
27 return count;
28 }
29
30 int main()
31 {
32 char buff[
1000] = {
0};
33 scanf(
"%s", buff);
34 printf(
"%d\n", cha_num(buff));
35
36 return 0;
37 }
转载于:https://www.cnblogs.com/zaijiefangbeidawang/p/8254235.html
