ANSI C:创建作业数组

时间:2009-10-17 00:33:43

标签: c

所以,我们有这个家庭作业,建立在上周。我们应该创建单独的数组,其中包含指向特定作业类型的所有人的指针。这是我到目前为止的代码。我想知道是否有人可以帮助我。谢谢!

#include <stdio.h>
#include <stdlib.h>
#include "Person.h"
#include "data.h"
#define new

char * randomVal(char * arr[], int elements)
{
    int value = (int)(rand() % elements);
    char * name = arr[value];
    return name;
}

int main (int argc, const char * argv[]) 
{
    Person * Population[100];
    int i;
    for (i = 0; i < 100; i++)
    {
        Population[i] = new person(randomVal(Names, 10), randomVal(Vehicles, 5), randomVal(Jobs, 5), randomVal(Job_Pace, 3), randomVal(Education, 4), randomVal(Work_Ethic, 3), randomVal(Sleep_Habits, 3));
        Population[i]->print(Population[i]);
    }
    for (i=0; i<100; i++) {
        destroy(Population[i]);
    }
    //Person * p1 = new person(randomName(), "Camero", "Lawyer", "Fast", "Doctorate", "Poor", "Poor");
    //p1->print(p1);


    return 0;
}


/*
 *  Person.h
 *  Person2
 *
 *  Created by Tracie Marshall on 10/15/09.
 *  Copyright 2009 Me. All rights reserved.
 *
 */

typedef struct
{
    //data
    //dynamic sized vars
    char * name;
    char * vehicle;
    char * job;
    char * job_pace;
    char * education;
    char * work_ethic;
    char * sleep_habits;

    //static-sized vars
    double bank_account;
    int leadership;
    int IQ;
    int aggro;
    int outfit;
    int alertness;

    //methods
    void (*print)(void *);
} Person;

Person * person(char * n, char * v, char * j, char * jp, char * ed, char * w, char * s);
void printPerson(Person* p);
void destroy(Person * p);

/*
 *  Person.c
 *  Person2
 *
 *  Created by Tracie Marshall on 10/15/09.
 *  Copyright 2009 Me. All rights reserved.
 *
 */

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

char * newString(char * dest, char * source)
{
    dest = (char *)malloc((strlen(source) + 1) * sizeof(char));
    strcpy(dest, source);
    return dest;
}

void printPerson(Person* p)
{
    printf("\n%s:\n\tvehicle:\t%s\n\tjob:\t\t%s\n\tjob pace:\t%s\n\teducation:\t%s\n\twork ethic:\t%s\n\tsleep habit:\t%s", p->name, p->vehicle, p->job, p->job_pace, p->education, p->work_ethic, p->sleep_habits);//, p->age, p->job, p->spouse);
}

Person * person(char * n, char * v, char * j, char * jp, char * ed, char * w, char * s)
{
    //allocate self
    Person * p = (Person *) malloc(sizeof(Person));

    //allocate dynamic variables on stack
    p->name = newString(p->name, n);
    p->vehicle = newString(p->vehicle, v);
    p->job = newString(p->job, j);
    p->job_pace = newString(p->job_pace, jp);
    p->education = newString(p->education, ed);
    p->work_ethic = newString(p->work_ethic, w);
    p->sleep_habits = newString(p->sleep_habits, s);

    //initalize static-size variables
    p->bank_account; // = ba;
    p->IQ;
    p->aggro;
    p->outfit;
    p->alertness;

    //initialize function pointers
    p->print = &printPerson;

    return p;
}
void destroy(Person * p)
{
    free(p->name);
    free(p->vehicle);
    free(p->job);
    free(p->job_pace);
    free(p->education);
    free(p->work_ethic);
    free(p->sleep_habits);

    free(p);
}

/*
 *  data.h
 *  Person2
 *
 *  Created by Tracie Marshall on 10/15/09.
 *  Copyright 2009 Me. All rights reserved.
 *
 */

char * Names[10] = {"Lisa", "Pamela", "Amanda", "Gerard", "Dan", "Patrick", "Peter", "Michael", "Sally", "Tracie"};
char * Vehicles[5] = {"Feet", " Old Bike","New Bike", "Cheap Car", "Expensive Car"};
char * Jobs[5] = {"Unemployed", "Burger World", "Junior Programmer", "Senior Programmer", "Academia"};
char * Job_Pace[3] = {"Easy Going", "9-5 Grind", "Whirl Wind"};
char * Education[4] = {"Bum", "High School", "College", "Graduate School"};
char * Work_Ethic[3] = {"Drifter", "Hard Worker", "Workaholic"};
char * Sleep_Habits[3] = {"Good", "Medium", "Poor"};

1 个答案:

答案 0 :(得分:3)

我不确定您的问题是什么,但我会在您更新问题时尝试更新我的答案。

需要注意的一点是,您使用的是C ++(或C99)样式注释(//comment here)。如果您使用严格的ANSI C90支持进行编译,那么这将失败。另外,不要强制转换malloc(这源于C90及以上编译器中不存在的一个非常古老的问题)。

此外,这不是ANSI C.你有这一行:

Population[i] = new person(randomVal(Names, 10), ... /* snipped for brevity */

ANSI C中没有“new”关键字。这对于C ++来说甚至都不是正确的语法(只需看一眼就可以看出你可以放弃new和{{1函数返回正确的东西)。

修改

好的,这是对评论的回应。有一个很多的方法可以做到这一点。一种简单的方法是为可以拥有特定工作的人数设置限制。然后你可以创建一个具有相同大小的Jobs数组的数组,并且每个索引到这个新数组(比如HasJob)可以将索引与Jobs数组匹配。因此,HasJob [0]可以存储每个拥有“失业”工作的人。您可以为每个HasJob条目保留一个单独的计数,因此当您插入时,您知道在哪里粘贴新的Person对象,或者您可以将所有值初始化为NULL,然后每次插入时,都进行线性搜索。

所以你可以:

person()

现在,您可以通过执行类似

的操作将每个Person插入HasJob数组中
/* 5 is the number of possible Jobs and 100 is the max persons per job */
Person *HasJob[5][100];

memset(HasJob, 0, 5*100*sizeof(Person *));

所以,我没有尝试编译它,可能存在一些问题,但这是这种方式的一般过程。从本质上讲,你会完成每份工作,然后每个工作都要经过每个人;如果那个人在那份工作,在HasJob找到一个空位并将那个人放在那里。

同样,有很多方法可以做到这一点。您可以为每个作业保留计数,然后您不必进行线性扫描,但是此方法可以防止您必须跟踪并实例化这些变量。另一种方法是使用链表。这可能会给你一个想法。当然,您应该对每个常量值使用int i, j, k; for(i=0; i < 5; i++) { for(j=0; j < 100; j++) { if(strcmp(Population[j]->job, Jobs[i]) == 0) { k = 0; while(((p = HasJob[i][k]) != NULL) && (k < 100) k++; if(k != 100) /* if k == 100, somehow too many persons have this job */ { HasJob[i][k] = Population[j]; } } } } '(最大值,例如5和100可以是#defineMAX_JOBS等。