calc_score.cc

/* 
 * 함수포인터를 사용하여 전략패턴을 구사
 * vector 사용
 */

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

using namespace std;

typedef struct _pinfo
{
    char name[12];
    int math;
    int korean;
    int eng;
} pinfo;

void printmax(vector<pinfo> va, void(*SortFunc)(vector<pinfo>))
{
    printf("최고 성적 출력 프로그램\n");
    SortFunc(va);
}

void engmax(vector<pinfo> va)
{
    int max = 0;
    int index = 0;
    for (int i=0; i<va.size(); i++)
    {
        if(va[i].eng > max)
        {
            max = va[i].eng;
            index = i;
        }
    }
    printf("영어 최고점수 획득자는 %s: %d\n",
        va[index].name,
        va[index].eng);
}

void avgmax(vector<pinfo> va)
{
    int max = 0;
    int total;
    int index = 0;
    for (int i=0; i<va.size(); i++)
    {
        total = (va[i].eng + va[i].math + va[i].korean);
        if(total > max)
        {
            max = total;
            index = i;
        }
    }

    printf("최고점자 : \n");
    printf("이름 : %s\n", va[index].name);
    printf("영어 : %d\n", va[index].eng);
    printf("국어 : %d\n", va[index].korean);
    printf("수학 : %d\n", va[index].math);
    printf("평점 : %.2f\n", (float)max/3.);
}

int main()
{
    pinfo myinfo;
    vector<pinfo> va;

    myinfo.korean = 80;
    myinfo.eng    = 65;
    myinfo.math   = 99;
    strncpy(myinfo.name, "jsyoo", 12);
    va.push_back(myinfo);

    myinfo.korean = 90;
    myinfo.eng    = 65;
    myinfo.math   = 74;
    strncpy(myinfo.name, "kate", 12);
    va.push_back(myinfo);

    myinfo.korean = 63;
    myinfo.eng    = 88;
    myinfo.math   = 55;
    strncpy(myinfo.name, "jenny", 12);
    va.push_back(myinfo);

    printmax(va, engmax);
    printmax(va, avgmax);

    printf("engmax : %p\n", engmax);
    printf("avgmax : %p\n", avgmax);
    printf("printmax : %p\n", printmax);
}