Solution for Exercise 20-10

ex2010

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

int main()
{
    struct stock {
        char symbol[5];
        int quantity;
        float price;
        struct stock *next;
    };
    struct stock *first;
    struct stock *current;
    struct stock *new;

/* Create structure in memory */
    first=(struct stock *)malloc(sizeof(struct stock));
    if(first==NULL)
    {
        puts("Some kind of malloc() error");
        exit(1);
    }

/* Assign structure data */
    current=first;
    strcpy(current->symbol,"GOOG");
    current->quantity=100;
    current->price=801.19;
    current->next=NULL;

    new=(struct stock *)malloc(sizeof(struct stock));
    if(new==NULL)
    {
        puts("Another malloc() error");
        exit(1);
    }
    current->next=new;
    current=new;
    strcpy(current->symbol,"MSFT");
    current->quantity=100;
    current->price=28.77;
    current->next=NULL;

/* Display database */
    puts("Investment Portfolio");
    printf("Symbol\tShares\tPrice\tValue\n");
    current=first;
    printf("%-6s\t%5d\t%.2f\t%.2f\n",\
            current->symbol,
            current->quantity,
            current->price,
            current->quantity*current->price);
    current=current->next;
    printf("%-6s\t%5d\t%.2f\t%.2f\n",\
            current->symbol,
            current->quantity,
            current->price,
            current->quantity*current->price);

    return(0);
}
Exercise ex2011 →