-
Notifications
You must be signed in to change notification settings - Fork 2
/
realloc.c
89 lines (79 loc) · 1.59 KB
/
realloc.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct STU
{
int id;
char name[20];
char sex;
};
char str[20];
void input(struct STU student[],int i)
{
fgets(str,sizeof(str),stdin);
str[strlen(str) - 1] = '\0';
student[i].id = atoi(str);
fgets(str,sizeof(str),stdin);
str[strlen(str) - 1] = '\0';
strcpy(student[i].name,str);
fgets(str,sizeof(str),stdin);
student[i].sex = str[0];
return ;
}
void output(struct STU student[], int num)
{
int i = 0, j = 0;
struct STU tmp;
for (i = 1; i < num; i++)
for (j = 0; j < num -i; j++)
if(strcmp(student[j].name,student[j+1].name)>0)
{
tmp = student[j];
student[j] = student[j + 1];
student[j + 1] = tmp;
}
for(i = 0; i < num; i++)
printf("%d\t%s\t%c\n",student[i].id,student[i].name,student[i].sex);
return ;
}
int main(int argc,char *argv[])
{ int num = 0;
if(argc < 2)
{
printf("please enter ./a.out num\n");
exit(-1);
}
num = atoi(argv[1]);
char ch;
int i, j = 0;
struct STU *p, *q, student[num];
p = calloc(num,sizeof(struct STU));
q = p;
q = student;
for(i = 0; i < num; i++)
input(student,i);
while(1)
{
printf("是否继续录入学生信息?(Y/N)");
fgets(str,sizeof(str),stdin);
ch = str[0];
if(ch == 'N' || ch == 'n')
{
output(student,num);
break;
}
else if(ch == 'Y' || ch == 'y')
{
printf("请输入继续输入学生的数量:\n");
fgets(str,sizeof(str),stdin);
str[strlen(str) - 1] = '\0';
j = atoi(str);
p = realloc(p,sizeof(struct STU) * (num + j));
for(i = num; i < num + j; i++)
input(student,i);
num += j;
}
}
free(p);
return 0;
}