이것이 c언어다. 17장 저금통

동전 단위와, 갯수를 입력받아 총액을 출력한다.

#include <stdio.h>

typedef struct {

    int w500;

    int w100;

    int w50;

    int w10;

}MoneyBox;

void init(MoneyBox *s);

void save(MoneyBox *s, int unit, int cnt);

int total(MoneyBox *s);

int main(int argc, char *argv[])

{

    MoneyBox stMB;

    MoneyBox *pStMB = &stMB;

    int nTotalPrice = 0;

    int nCoin = 0;

    int nCount = 0;

    init(pStMB);

    while(nCoin != -1)

    {

        printf("coin's price and count (EXIT : -1).");

        scanf("%d",&nCoin);

        if(nCoin == -1)

            break;

        scanf("%d",&nCount);

        save(pStMB,nCoin,nCount);

    }

    nTotalPrice = total(pStMB);

    printf("total price : %d\n",nTotalPrice);

    printf("500 : %d, 100 : %d, 50 : %d, 10 : %d\n\n",pStMB->w500*500,pStMB->w100*100, pStMB->w50*50, pStMB->w10*10);

    return 0;

}

void init(MoneyBox *pStMB)

{

    pStMB->w500 = 0;

    pStMB->w100 = 0;

    pStMB->w50 = 0;

    pStMB->w10 = 0;

}

void save (MoneyBox *pStMB, int unit, int cnt)

{

    switch(unit)

    {

        case 500 : pStMB->w500 = pStMB->w500 + cnt;break;

    case 100 : pStMB->w100 = pStMB->w100 + cnt;break;

    case 50 : pStMB->w50 = pStMB->w50 + cnt;break;

    case 10 : pStMB->w10 = pStMB->w10 + cnt;break;

    }

}

int total(MoneyBox *pStMB)

{

    int m_total;

    m_total = pStMB->w500*500 + pStMB->w100*100 + pStMB->w50*50 + pStMB->w10*10;

    return m_total;

}