1 # include <iostream>
 2 #define N 256
 3 using namespace std;
 4 struct student
 5 {
 6     char* num;
 7     int score;
 8 };
 9 struct student max(struct student s[N],int n)
10 {
11     struct student t = {0,s[0].score };
12     t.num = (char*)malloc(sizeof(char));
13     for (int i = 0; i < n; i++)
14     {
15         if (s[i].score > t.score)
16         {
17             t.score = s[i].score;
18             t.num = s[i].num;
19         }
20     }
21     return t;
22 }
23 int main()
24 {
25     struct student s[N] = {}, t = {};
26     int n,i;
27     t.num = (char*)malloc(sizeof(char));
28     cout << "输入学生数：" << endl;
29     /*char a[N];
30     s->num = a;*/
31     cin >> n;
32     cout << "输入各学生序号及成绩：" << endl;
33     for (i = 0; i < n; i++)
34     {
35         s[i].num = (char*)malloc(sizeof(char));
36         cin >> s[i].num >> s[i].score;
37     }
38     t=max(s,n);
39     cout << "最高分者序号为" << *t.num <<"，分值为：" << t.score << endl;
40     system("pause");
41     return 0;
42 }

  1 #include <iostream>
  2 
  3 
  4 
  5 using namespace std;
  6 
  7 
  8 
  9 struct Student {
 10 
 11     char* num;
 12 
 13     int score;
 14 
 15 };
 16 
 17 
 18 
 19 Student max(const Student* students, int count) {
 20 
 21     if (count <= 0) {
 22 
 23         cerr << "Error: Empty student array" << endl;
 24 
 25         exit(EXIT_FAILURE);
 26 
 27     }
 28 
 29 
 30 
 31     const Student* maxStudent = &students[0];
 32 
 33 
 34 
 35     for (int i = 1; i < count; ++i) {
 36 
 37         if (students[i].score > maxStudent->score) {
 38 
 39             maxStudent = &students[i];
 40 
 41         }
 42 
 43     }
 44 
 45 
 46 
 47     return *maxStudent;
 48 
 49 }
 50 
 51 
 52 
 53 int main() {
 54 
 55     const int MAX_STUDENTS = 100;
 56 
 57 
 58 
 59     int numStudents;
 60 
 61     cout << "Enter the number of students: ";
 62 
 63     cin >> numStudents;
 64 
 65 
 66 
 67     if (numStudents <= 0 || numStudents > MAX_STUDENTS) {
 68 
 69         cerr << "Invalid number of students" << endl;
 70 
 71         return EXIT_FAILURE;
 72 
 73     }
 74 
 75 
 76 
 77     Student* students = new Student[numStudents];
 78 
 79 
 80 
 81     for (int i = 0; i < numStudents; ++i) {
 82 
 83         students[i].num = new char[20]; // Assuming a maximum length of 19 for the student number
 84 
 85         cout << "Enter student " << i + 1 << " information:" << endl;
 86 
 87         cout << "Student Number: ";
 88 
 89         cin >> students[i].num;
 90 
 91         cout << "Score: ";
 92 
 93         cin >> students[i].score;
 94 
 95     }
 96 
 97 
 98 
 99     Student highestScoreStudent = max(students, numStudents);
100 
101 
102 
103     cout << "Student with the highest score:" << endl;
104 
105     cout << "Student Number: " << highestScoreStudent.num << endl;
106 
107     cout << "Score: " << highestScoreStudent.score << endl;
108 
109 
110 
111     for (int i = 0; i < numStudents; ++i) {
112 
113         delete[] students[i].num;
114 
115     }
116 
117 
118 
119     delete[] students;
120 
121 
122 
123     system("pause");
124 
125 
126 
127     return 0;
128 
129 }

 1 # include <iostream>
 2 #define N 256
 3 using namespace std;
 4 struct time
 5 {
 6     int month;
 7     int date;
 8 };
 9 int change(struct time t,bool run)
10 {
11     int i,num=0, a[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 }, b[12] = { 31,29,31,30,31,30,31,31,30,31,30,31 };
12     if (run == 1)
13         for (i = 0; i < t.month-1; i++)
14             num += b[i];
15     else
16         for (i = 0; i < t.month-1; i++)
17             num += a[i];
18     num += t.date;
19     return num;
20 }
21 int main()
22 {
23     struct time t;
24     bool run;
25     int num;
26     cout << "今年是不是闰年？（是：1；否：0）" << endl;
27     cin >> run;
28     cout << "输入一日期（月/日）" << endl;
29     cin >> t.month >> t.date;
30     num = change(t, run);
31     cout << "这是今年的第" << num << "天" << endl;
32     system("pause");
33     return 0;
34 }

 1 #include <iostream>
 2 
 3 
 4 
 5 using namespace std;
 6 
 7 
 8 
 9 struct Date {
10 
11     int year;
12 
13     int month;
14 
15     int day;
16 
17 };
18 
19 
20 
21 int dayOfYear(const Date& date) {
22 
23     const int daysInMonth[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
24 
25 
26 
27     int totalDays = 0;
28 
29 
30 
31     for (int i = 1; i < date.month; ++i) {
32 
33         totalDays += daysInMonth[i];
34 
35     }
36 
37 
38 
39     totalDays += date.day;
40 
41 
42 
43     // Adjust for leap year
44 
45     if ((date.year % 4 == 0 && date.year % 100 != 0) || (date.year % 400 == 0 && date.month > 2)) {
46 
47         totalDays++;
48 
49     }
50 
51 
52 
53     return totalDays;
54 
55 }
56 
57 
58 
59 int main() {
60 
61     Date inputDate;
62 
63 
64 
65     cout << "Enter date (year month day): ";
66 
67     cin >> inputDate.year >> inputDate.month >> inputDate.day;
68 
69 
70 
71     int result = dayOfYear(inputDate);
72 
73 
74 
75     cout << "The day of the year for the given date is: " << result << endl;
76 
77 
78 
79     system("pause");
80 
81 
82 
83     return 0;
84 
85 }

 1 #include <iostream>
 2 #define N 5
 3 using namespace std;
 4 struct book
 5 {
 6     char name[100];
 7     int price;
 8 };
 9 struct book *sort(struct book b[])
10 {
11     int i, j;
12     struct book a;
13     for(i=0;i<N-1;i++)
14         for (j = 0; j < N - 1 - i; j++)
15         {
16             //for(int z=0; b[j].name[z] != '\0' && b[j + 1].name[z] != '\0';z++)
17             if (strcmp(b[j].name, b[j+1].name) > 0)
18             {
19                 a = b[j];
20                 b[j] = b[j + 1];
21                 b[j + 1] = a;
22             }
23         }
24     struct book* p = b;
25     return p;
26 }
27 int main()
28 {
29     struct book b[N],*p;
30     int i;
31     for (i = 0; i < N; i++)
32         cin >> b[i].name >> b[i].price;
33     p = sort(b);
34     cout << "排序后结果：" << endl;
35     for (i = 0; i < N; i++)
36         cout << p[i].name << ' ' << p[i].price << endl;
37     system("pause");
38     return 0;
39 }

 1 #include <iostream>
 2 
 3 #include <cstring>
 4 
 5 #include <algorithm>
 6 
 7 
 8 
 9 using namespace std;
10 
11 
12 
13 struct Book {
14 
15     char title[100];
16 
17     double price;
18 
19 };
20 
21 
22 
23 bool compareBooks(const Book& book1, const Book& book2) {
24 
25     return strcmp(book1.title, book2.title) < 0;
26 
27 }
28 
29 
30 
31 int main() {
32 
33     const int NUM_BOOKS = 10;
34 
35     Book books[NUM_BOOKS];
36 
37 
38 
39     for (int i = 0; i < NUM_BOOKS; ++i) {
40 
41         cout << "Enter details for book " << i + 1 << ":" << endl;
42 
43         cout << "Title: ";
44 
45         cin.getline(books[i].title, sizeof(books[i].title));
46 
47         cout << "Price: ";
48 
49         cin >> books[i].price;
50 
51         cin.ignore(); // Ignore the newline character left in the input buffer
52 
53     }
54 
55 
56 
57     sort(books, books + NUM_BOOKS, compareBooks);
58 
59 
60 
61     cout << "Books sorted by title:" << endl;
62 
63     for (int i = 0; i < NUM_BOOKS; ++i) {
64 
65         cout << "Title: " << books[i].title << ", Price: " << books[i].price << endl;
66 
67     }
68 
69 
70 
71     system("pause");
72 
73 
74 
75     return 0;
76 
77 }