- 2024高级语言程序设计：https://edu.cnblogs.com/campus/fzu/2024C
- 高级语言程序设计课程第五次作业：https://edu.cnblogs.com/campus/fzu/2024C/homework/13311
- 学号：102400215
- 姓名：胡加乘
14.17 复习题
3
struct month
{const char* name; // 月份名const char abbr[4]; // 月份缩写int days; // 天数int no; // 月份号
};
4
struct month arr[12] ={{ "January", "Jan", 31, 1 },{ "February", "Feb", 28, 2 },{ "March", "Mar", 31, 3 },{ "April", "Apr", 30, 4 },{ "May", "May", 31, 5 },{ "June", "Jun", 30, 6 },{ "July", "Jul", 31, 7 },{ "Augest", "Aug", 31, 8 },{ "Spetember", "Sep", 30, 9 },{ "October", "Oct", 31, 10 },{ "November", "Nov", 30, 11 },{ "December", "Dec", 31, 12 },};
5
struct month arr[12] =
{{ "January", "Jan", 31, 1 },{ "February", "Feb", 28, 2 },{ "March", "Mar", 31, 3 },{ "April", "Apr", 30, 4 },{ "May", "May", 31, 5 },{ "June", "Jun", 30, 6 },{ "July", "Jul", 31, 7 },{ "Augest", "Aug", 31, 8 },{ "Spetember", "Sep", 30, 9 },{ "October", "Oct", 31, 10 },{ "November", "Nov", 30, 11 },{ "December", "Dec", 31, 12 },
};int totalDays(int month);int main()
{cout << "到七月为止的总天数（包括七月）：" << totalDays(7);return 0;
}int totalDays(int month)
{int sum = 0;for (int i = 0; i < month; i++){sum += arr[i].days;}return sum;
}
10
struct gas
{float distance; // 英里数float gals; // 加仑float mpg; // 每加仑行驶的英里数
};void cal_mpg(struct gas* g);int main()
{struct gas g = { 100, 20, -1 };cal_mpg(&g);cout << g.mpg;return 0;
}void cal_mpg(struct gas* g)
{g->mpg = g->distance / g->gals;
}
11
enum choices
{no = 0,yes = 1,maybe = 2,
};
14.18 编程练习
3
#include <iostream>using namespace std;char* s_gets(char* st, int n);#define MAXTITL 40
#define MAXAUTL 40
#define MAXBKS 100struct book
{char title[MAXTITL]; // 书名char author[MAXAUTL]; // 作者float value; // 价格
};void sort_by_title(struct book* bks, int count);
void sort_by_value(struct book* bks, int count);int main()
{struct book library[MAXBKS];struct book* pbk[MAXBKS];// 图书总数int count = 0;int index;// 提示用户输入图书信息printf("Please enter the book title.\n");printf("Press [enter] at the start of a line to stop.\n");while (count < MAXBKS && s_gets(library[count].title, MAXTITL) != NULL&& library[count].title[0] != '\0'){printf("Now enter the author.\n");s_gets(library[count].author, MAXAUTL);printf("Now enter the value.\n");scanf_s("%f", &library[count++].value);while (getchar() != '\n')continue;if (count < MAXBKS)printf("Enter the next title.\n");}if (count > 0){printf("Here is the list of your books:\n");// 按标题排序sort_by_title(library, count);// 按价格排序// sort_by_value(library, count);for (index = 0; index < count; index++){printf("%s is by %s: $%.2f\n",library[index].title,library[index].author,library[index].value);}}else{printf("No books? Too bad.\n");}return 0;
}void sort_by_predicate(struct book* bks, int count,bool (*predicate)(struct book bk1, struct book bk2))
{for (int i = 0; i < count; i++){for (int j = 0; j < count - i - 1; j++){if (predicate(bks[j], bks[j + 1])){struct book tmp = bks[j];bks[j] = bks[j + 1];bks[j + 1] = tmp;}}}
}bool title_predicate(struct book bk1, struct book bk2)
{return bk1.title[0] > bk2.title[0];
}void sort_by_title(struct book* bks, int count)
{sort_by_predicate(bks, count, title_predicate);
}bool value_predicate(struct book bk1, struct book bk2)
{return bk1.value > bk2.value;
}void sort_by_value(struct book* bks, int count)
{sort_by_predicate(bks, count, value_predicate);
}char* s_gets(char* st, int n)
{char* ret_val;char* find;ret_val = fgets(st, n, stdin);if (ret_val) {find = strchr(st, '\n'); // look for newlineif (find) // if the address is not NULL,*find = '\0'; // place a null character thereelsewhile (getchar() != '\n')continue; // dispose of rest of line}return ret_val;
}
4
#include <iostream>using namespace std;typedef struct
{int insurance;struct{const char* first_name;const char* middle_name;const char* last_name;} name;
} person;void printPerson(person p);int main()
{person contacts[5] ={{ 302039823, { "Michael", "James", "Johnson" } },{ 485729163, { "Olivia", "Rose", "Smith" } },{ 793462815, { "William", "Henry", "Anderson" } },{ 628413957, { "Benjamin", NULL, "Harris" } },{ 172948506, { "Charlotte", "Anne", "Lee" } },};for (int i = 0; i < 5; i++){printPerson(contacts[i]);}return 0;
}void printPerson(person p)
{cout << p.name.first_name << ", " << p.name.last_name;if (p.name.middle_name)cout << " " << p.name.middle_name[0] << ".";cout << " -- " << p.insurance << endl;
}
5
#include <iostream>using namespace std;#define LEN 21
#define SCORES 3
#define CSIZE 4struct name
{char first_name[LEN];char last_name[LEN];
};struct student
{struct name person;float grade[SCORES];float avg;
};void input_scores(struct student arr[], int n);
void calc_avg(struct student arr[], int n);
void show_students(const struct student arr[], int n);int main()
{struct student students[CSIZE] = {{ "Emily", "Carter" },{ "Michael", "Johnson" },{ "William", "Anderson" },{ "Charlotte", "Lee" }};// d.输入学生成绩input_scores(students, CSIZE);// e.计算平均值calc_avg(students, CSIZE);// f. 打印每个学生的信息、平均分show_students(students, CSIZE);return 0;
}void input_scores(struct student arr[], int n)
{int i, j;for (i = 0; i < n; i++){// 提示用户输入学生成绩printf("Please enter %d scores for %s %s:\n",SCORES, arr[i].person.first_name, arr[i].person.last_name);for (j = 0; j < SCORES; j++) {while (scanf_s("%f", &arr[i].grade[j]) != 1) {scanf_s("%*s");puts("Please use numeric input.");}}}
}void calc_avg(struct student arr[], int n)
{int i, j;float sum;for (i = 0; i < n; i++) {sum = 0;for (j = 0; j < SCORES; j++)sum += arr[i].grade[j];// 计算平均值arr[i].avg = sum / SCORES;}
}void show_students(const struct student arr[], int n)
{int i, j;// 全名char full_name[2 * LEN];printf("\nHere is student's score list:\n");for (i = 0; i < n; i++){strcpy(full_name, arr[i].person.first_name);strcat(full_name, " ");strcat(full_name, arr[i].person.last_name);// 打印全名printf("%15s: ", full_name);for (j = 0; j < SCORES; j++)printf("%6.1f ", arr[i].grade[j]);// 打印平均分printf(" Average = %5.2f\n", arr[i].avg);}
}
