Question

1. Competitors

The results of a running competition are shown in the table below.

Index	Name	Birthdate	Rank
0	Am, Erica	1984. 05. 06.	1
1	Abnorm, Al	1982. 09. 30.	3
2	Pri, Mary	1988. 08. 25.	2
3	Duck, Ling	1979. 06. 10.	5
4	Mac, Donald	1992. 04. 05.	4

Find an unfinished program below that contains the appropriate types and the above data in an array. Complete the program, step-by-step, according to the comments.

#include <stdio.h>
 
typedef struct Date {
    int year, month, day;
} Date;
 
typedef struct Competitor {
    char name[31];
    Date birth;
    int rank;
} Competitor;
 
void Date_print(Date d);
 
void Competitor_print(Competitor c);
 
int main() {
    Competitor competitors[5] = {
        { "Am, Erica", {1984, 5, 6}, 1 },
        { "Abnorm, Al", {1982, 9, 30}, 3 },
        { "Pri, Mary", {1988, 8, 25}, 2 },
        { "Duck, Ling", {1979, 6, 10}, 5 },
        { "Mac, Donald", {1992, 4, 5}, 4 },
    };
 
    /* name of competitor 0 - printf %s */
    /* rank of competitor 2 */
    /* birth date of competitor 4, use the given function */
    /* the first letter of the name of competitor 1 (a string is an array of characters) */
    /* is competitor 1 among the best three? yes/no, may use ?: operator */
    /* is competitor 4 faster than competitor 3? */
    /* was competitor 1 born in the same year as competitor 2? */
    /* complete the Competitor_print() function,
     * then print all data of competitor 1 */
    /* at last print all data of all competitors. */
 
    return 0;
}
 
void Date_print(Date d) {
    /* print year, month and day */
}
 
void Competitor_print(Competitor c) {
    /* print all data of the competitor */
}

Answer 1

#include <stdio.h>

typedef struct Date {
int year, month, day;
} Date;

typedef struct Competitor {
char name[31];
Date birth;
int rank;
} Competitor;

void Date_print(Date d);

void Competitor_print(Competitor c);

int main() {
Competitor competitors[5] = {
{ "Am, Erica", {1984, 5, 6}, 1 },
{ "Abnorm, Al", {1982, 9, 30}, 3 },
{ "Pri, Mary", {1988, 8, 25}, 2 },
{ "Duck, Ling", {1979, 6, 10}, 5 },
{ "Mac, Donald", {1992, 4, 5}, 4 },
};

/* name of competitor 0 - printf %s */
printf("Name of competitor 0: %s\n",competitors[0].name);

/* rank of competitor 2 */
printf("Rank of competitor 2: %d\n",competitors[2].rank);

/* birth date of competitor 4, use the given function */
printf("Birth date of competitor 4: ");
Date_print(competitors[4].birth);

/* the first letter of the name of competitor 1 (a string is an array of characters) */
printf("The first letter of the name of competitor 1: %c\n",competitors[1].name[0]);

/* is competitor 1 among the best three? yes/no, may use ?: operator */
printf("Is competitor 1 among the best three? ");
competitors[1].rank <= 3 ? printf("yes\n"): printf("no\n");

/* is competitor 4 faster than competitor 3? */
printf("Is competitor 4 faster than competitor 3? ");
competitors[4].rank < competitors[3].rank ? printf("yes\n"): printf("no\n");

/* was competitor 1 born in the same year as competitor 2? */
printf("Was competitor 1 born in the same year as competitor 2? ");
competitors[1].birth.year == competitors[2].birth.year ? printf("yes\n"): printf("no\n");

/* then print all data of competitor 1 */
printf("Competitor 1:\n");
Competitor_print(competitors[1]);

/* at last print all data of all competitors. */
printf("Details of all competitor:\n");
for(int i=0;i<5;i++)
Competitor_print(competitors[i]);

return 0;
}

// function to display input Date d
void Date_print(Date d) {
printf("%d/%d/%d\n",d.day,d.month,d.year);
}

// function to display all details of Competitor c
void Competitor_print(Competitor c) {
printf("Name: %s, Rank: %d, Date: %d/%d/%d\n",c.name, c.rank, c.birth.day, c.birth.month, c.birth.year);
}

//end of program

Output: