1 #include<stdio.h>
2 #include<stdlib.h>
3
4 #define INI_LEN 20
5 #define INC 10
6 char* get_input();
7 void output(char* array);
8 int main(){
9 printf("请输入字符串，双回车结束：\n");
10 char *string = get_input();
11
12 output(string);
13 getchar();
14 return 0;
15 }
16 //输入函数
17 char* get_input(){
18 char* string = (char*)malloc(INI_LEN*sizeof(char));
19 int len = INI_LEN;
20 int i = 0,cnt = 0;
21 while (cnt != 2){
22 if (i + 1 == len){
23 len += INC;
24 char* tmp = string;
25 string = (char*)malloc(len*sizeof(char));
26 for (int k = 0; k <= i; ++k)
27 string[k] = tmp[k];
28 free(tmp);
29 }
30 string[i] = getchar();
31 if (string[i] == '\n')
32 cnt++;
33 else
34 cnt = 0;
35 i++;
36 }
37 string[i-1] = '\0';
38 return string;
39
40 }
41 //输出函数
42 void output(char* array){
43 int tag = 1,cnt = 1;
44 for (int i = 0; array[i]!='\0'; ++i){
45 if (tag == 1){
46 tag = 0;
47 if (array[i] != '\n'&&array[i] != '\0')
48 printf("%d. ", cnt);
49 }
50 if (array[i] == '\n'){
51 if (array[i+1] != '\n'&&array[i+1] != '\0'){
52 tag = 1;
53 cnt++;
54 }
55 }
56 printf("%c", array[i]);
57 }
58 }
