Solution for Exercise 20-11

ex2011

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

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

    /* allocate structre */
    first=(struct stk *)malloc(sizeof(struct stk)*1);
    if(first==NULL)
    {
        puts("Some kind of malloc() error");
        exit(1);
    }
    /* set the base */
    current=first;

    /* assign structure data */
    strcpy(current->symbol,"GOOG");
    current->quantity=26;
    current->price=1373.19;

    /* allocate the next structure */
    current->next=(struct stk *)malloc(sizeof(struct stk)*1);
    if(current->next==NULL)
    {
        puts("Another malloc() error");
        exit(1);
    }
    /* reference the new structure */
    current=current->next;
    strcpy(current->symbol,"MSFT");
    current->quantity=67;
    current->price=183.16;
    /* cap the end of the list */
    current->next=NULL;

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

    return(0);
}

Output

Investment Portfolio
Symbol  Shares  Price   Value
GOOG       26   1373.19 35702.94
MSFT       67   183.16  12271.72

Exercise ex2012 →