这个作业属于哪个课程：https://edu.cnblogs.com/campus/fzu/2024C/
这个作业要求在哪里： https://edu.cnblogs.com/campus/fzu/2024C/homework/13311
学号：092300125
姓名：张天荣
14.17
3.
struct Month {char name[12];char nmee2[4];int day;int id;
};
#include <stdio.h>typedef struct Month {char name[12];char nmee2[4];int day;int id;
}Month;int main(void) {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},{"August","aug",31,8},{"September","sep",30,9},{"October","oct",31,10},{"Novermber","nov",30,11},{"December","dec",31,12},};return 0;}
#include <stdio.h>typedef struct Month {char name[12];char nmee2[4];int day;int id;
}Month;int SumDay(Month* arr,int n) {int i = 0;int sum = 0;if (n < 1 && n>12)return -1;else {for (i = 0; i < n; i++) sum += arr[i].day;}return sum;
}int main(void) {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},{"August","aug",31,8},{"September","sep",30,9},{"October","oct",31,10},{"Novermber","nov",30,11},{"December","dec",31,12},};int n = 2;printf("%d",SumDay(arr,n));return 0;}
10
typedef struct gas {float distance;float gals;float mpg;
}gas;gas a(gas x) {if (x.gals > 0)x.mpg = x.distance / x.gals;elsex.mpg = -1.0;return x;
}void b(gas* x) {if (x->gals > 0)x->mpg = x->distance / x->gals;elsex->mpg = -1.0;
}
#include <stdio.h>enum choices{no,yes,maybe};int main(void) {enum choices a;a = no;printf("%d ",a);a = yes;printf("%d ", a);a = maybe;printf("%d ", a);return 0;}
14.18
3.
#include <stdio.h>
#include <string.h>
#define MAXTITL 40
#define MAXAUTL 40
#define MAXBKS 100struct book
{char title[MAXTITL];char author[MAXAUTL];float value;
};char* s_gets(char* st, int n);
void sort_title(struct book* pb[], int n);
void sort_value(struct book* pb[], int n);int main(void)
{struct book library[MAXBKS];struct book* book[MAXBKS];int count = 0;int index;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) && library[count].title[0] != '\0'){printf("Now enter the author.\n");s_gets(library[count].author, MAXAUTL);printf("Now enter the value.\n");scanf("%f", &library[count].value);book[count] = &library[count];count++;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");for (index = 0; index < count; index++){printf("%s by %s: $%.2f\n", library[index].title,library[index].author, library[index].value);}sort_title(book, count);printf("\nHere is the list of your books sorted by title letters:\n");for (index = 0; index < count; index++){printf("%s by %s: $%.2f\n", book[index]->title,book[index]->author, book[index]->value);}sort_value(book, count);printf("\nHere is the list of your books sorted by value(from low to high):\n");for (index = 0; index < count; index++){printf("%s by %s: $%.2f\n", book[index]->title,book[index]->author, book[index]->value);}}else{printf("No books? Too bad.\n");}return 0;
}void sort_title(struct book* pb[], int n)
{int i, j;struct book* temp;for (i = 0; i < n - 1; i++){for (j = i + 1; j < n; j++){if (strcmp(pb[j]->title, pb[i]->title) < 0){temp = pb[j];pb[j] = pb[i];pb[i] = temp;}}}return;
}void sort_value(struct book* pb[], int n)
{int i, j;struct book* temp;for (i = 0; i < n - 1; i++){for (j = i + 1; j < n; j++){if (pb[j]->value < pb[i]->value){temp = pb[j];pb[j] = pb[i];pb[i] = temp;}}}return;
}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');if (find){*find = '\0';}else{while (getchar() != '\n')continue;}}return ret_val;
}
4.
a.
#include <stdio.h>
#include <string.h>
#define N 15
#define LEN 30struct names
{char fname[N];char mname[N];char lname[N];
};struct messages
{char ins_num[LEN];struct names name;
};char *s_gets(char *st, int n);
void show(const struct messages pt[], int n);int main(void)
{int count = 0;struct messages m[5];printf("Please enter the insurance number:\n");printf("Press [enter] at the start of a line to stop.\n");while (count < 5 && s_gets(m[count].ins_num, LEN) && m[count].ins_num[0] != '\0'){printf("Now enter the former name.\n");s_gets(m[count].name.fname, N);printf("Now enter the middle name(Without, [enter] to the next).\n");s_gets(m[count].name.mname, N);printf("Now enter the last name.\n");s_gets(m[count].name.lname, N);if (count++ < 5){printf("Enter the next insurance number:\n");}}if (count > 0){show(m, count);}else{printf("No data!\n");}return 0;
}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');if (find){*find = '\0';}else{while (getchar() != '\n')continue;}}return ret_val;
}void show(const struct messages pt[], int n)
{int i;printf("All numbers messages:\n");for (i = 0; i < n; i++){if (pt[i].name.mname[0] == '\0'){printf("%s, %s", pt[i].name.fname, pt[i].name.lname);printf(" -- %s\n", pt[i].ins_num);}else{printf("%s, %s %c.", pt[i].name.fname, pt[i].name.lname, pt[i].name.mname[0]);printf(" -- %s\n", pt[i].ins_num);}}return;
}
b.
#include <stdio.h>
#include <string.h>
#define N 15
#define LEN 30struct names
{char fname[N];char mname[N];char lname[N];
};struct messages
{char ins_num[LEN];struct names name;
};char *s_gets(char *st, int n);
void show_messages(const struct messages pt);int main(void)
{int i;int count = 0;struct messages m[5];printf("Please enter the insurance number:\n");printf("Press [enter] at the start of a line to stop.\n");while (count < 5 && s_gets(m[count].ins_num, LEN) && m[count].ins_num[0] != '\0'){printf("Now enter the former name:\n");s_gets(m[count].name.fname, N);printf("Now enter the middle name(Without, [enter] to the next):\n");s_gets(m[count].name.mname, N);printf("Now enter the last name:\n");s_gets(m[count].name.lname, N);if (count++ < 5){printf("Enter the next insurance number:\n");}}if (count > 0){printf("All numbers messages:\n");for (i = 0; i < count; i++){show_messages(m[i]);}}else{printf("No data!\n");}return 0;
}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');if (find){*find = '\0';}else{while (getchar() != '\n')continue;}}return ret_val;
}void show_messages(const struct messages pt)
{if (pt.name.mname[0] == '\0'){printf("%s, %s", pt.name.fname, pt.name.lname);printf(" -- %s\n", pt.ins_num);}else{printf("%s, %s %c.", pt.name.fname, pt.name.lname, pt.name.mname[0]);printf(" -- %s\n", pt.ins_num);}return;
}
5.
#include <stdio.h>
#include <string.h>
#define LEN 15
#define CSIZE 4
#define SCORES 3struct name
{char fname[LEN];char lname[LEN];
};struct student
{struct name mes;float grade[SCORES];float aver;
};void set_students(struct student ar[], int n);
void find_averages(struct student ar[], int n);
void show_messages(const struct student ar[], int n);
void show_averages(const struct student ar[], int n);int main(void)
{struct student classes[CSIZE] = {{"Flip", "Snide"},{"Clare", "Voyans"},{"Bingo", "Higgs"},{"Fawn", "Hunter"},};set_students(classes, CSIZE);find_averages(classes, CSIZE);show_messages(classes, CSIZE);show_averages(classes, CSIZE);return 0;
}void set_students(struct student ar[], int n)
{int i, j;for (i = 0; i < n; i++){printf("Please enter three scores for %s %s:\n", ar[i].mes.fname, ar[i].mes.lname);for (j = 0; j < SCORES; j++){while (scanf("%f", &ar[i].grade[j]) != 1){while (getchar() != '\n')continue;printf("Please enter a number: ");}}}return;
}void find_averages(struct student ar[], int n)
{int i, j;float sum;for (i = 0; i < n; i++){for (j = 0, sum = 0.0f; j < SCORES; j++){sum += ar[i].grade[j];}ar[i].aver = sum / SCORES;}return;
}void show_messages(const struct student ar[], int n)
{int i, j;for (i = 0; i < n; i++){printf("%s %s's three scores: ", ar[i].mes.fname, ar[i].mes.lname);for (j = 0; j < SCORES; j++){printf("%g ", ar[i].grade[j]);}printf("\nAverage: %g\n", ar[i].aver);}return;
}void show_averages(const struct student ar[], int n)
{int i;float total;for (i = 0, total = 0.0f; i < n; i++){total += ar[i].aver;}printf("Class average: %g\n", total / n);return;
}
