roster.c #include <stdio.h> #include <string.h> #include <ctype.h> #define NAME_

Question

roster.c

#include <stdio.h>
#include <string.h>
#include <ctype.h>

#define NAME_LEN 30

struct player{
   int number;
   char first_name[NAME_LEN+1];
   char last_name[NAME_LEN+1];
   struct player *next;
};

struct player *append_to_list(struct player *roster);
void find_player(struct player *roster);
void printList(struct player *roster);
void clearList(struct player *roster);
int read_line(char str[], int n);

/**********************************************************
* main: Prompts the user to enter an operation code, *
* then calls a function to perform the requested *
* action. Repeats until the user enters the *
* command 'q'. Prints an error message if the user *
* enters an illegal code. *
**********************************************************/

int main(void){
   char code;

   struct player *team_roster = NULL;
   printf("Operation Code: a for appending to the roster, f for finding a player"
           ", p for printing the roster; q for quit. ");
   for(;;){
       printf("Enter operation code: ");
       scanf(" %c", &code);
       while (getchar() != ' ') /* skips to end of line */
           ;
       switch (code) {
           case 'a': team_roster = append_to_list(team_roster);
                       break;
           case 'f': find_player(team_roster);
                       break;
           case 'p': printList(team_roster);
                       break;
           case 'q': clearList(team_roster);
                       return 0;
           default: printf("Illegal code ");
       }
       printf(" ");
   }
}

struct player *append_to_list(struct player *roster){

   //add code here and remove the return NULL; statement
   return NULL;
}

void find_player(struct player *roster)
{
   //add code here

}
void printList(struct player *roster){

   //add code here

}
void clearList(struct player *roster)
{
   //add code here

}

int read_line(char str[], int n){
   int ch, i = 0;

   while (isspace(ch = getchar()))
       ;
   str[i++] = ch;
   while((ch = getchar()) != ' '){
       if (i < n)
           str[i++] = ch;
   }
   str[i] = '';
   return i;
}

Explanation / Answer

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