(C++기초플러스 6판 프로그래밍 연습 정답,솔루션) CHAPTER 08 함수의 활용 p.555~ 1번~7번

1번

#include<iostream>
using namespace std;
void print(char* a, int n = 0);

int main()
{
	char a[50];
	int n,count=0;
	for(;;)
	{
		cout << "문자열 입력 : ";
		cin.getline(a, 50);
		cout << "두번째 매개변수 입력: ";
		(cin >> n).get();
		if (n == 0)
		{
			print(a);
			count++;
		}
		else
			for (int i = 0; i < count; i++)
				print(a, n);
	}
	return 0;
}

void print(char* a, int n)
{
	cout << a << endl;
}

 

2번

#include<iostream>
#include<cstring>
using namespace std;
struct CandyBar
{
	char Brandname[40];
	double weight;
	int kcal;
};

void set_CandyBar(CandyBar& a, char* name = "Millennium Munch", double w = 2.85, int k = 350);
void show(CandyBar& a);

int main()
{
	CandyBar a;
	set_CandyBar(a);
	show(a);
}

void set_CandyBar(CandyBar& a, char* name,double w, int k)
{
	strcpy_s(a.Brandname, name);
	a.weight = w;
	a.kcal = k;
}
void show(CandyBar& a)
{
	cout << a.Brandname << endl
		<< a.weight << endl
		<< a.kcal << endl;
}

 

 

3번

#include<iostream>
#include<string>
#include<cctype>
using namespace std;
void up_alpha(string& a);
int main()
{
	string str;
	cout << "문자열을 입력하시오 (끝내려면 q) : ";
	getline(cin, str);
	while (str != "q")
	{
		up_alpha(str);
		cout << str << endl;
		cout << "다음 문자열을 입력하시오 (끝내려면 q) :";
		getline(cin,str);
	}
	cout << "끝" << endl;
	return 0;
}

void up_alpha(string& a)
{
	for (int i = 0; a[i] != '\0'; i++)
	{
		if (isalpha(a[i]))
			a[i]=toupper(a[i]);
	}
}

 

 

4번

#include<iostream>
using namespace std;
#include<cstring>
struct stringy
{
	char* str;
	int ct;
};

void set(stringy& beany, char* str);
void show(stringy a, int n = 1)
{
	for(int i=0;i<n;i++)
		cout<<a.str << endl;
}
void show(const char* a, int n = 1)
{
	for (int i = 0; i < n; i++)
		cout << a << endl;
}
int main()
{
	stringy beany;
	char testing[] = "Reality isn't what it used to be.";

	set(beany, testing);
	show(beany);
	show(beany, 2);
	testing[0] = 'D';
	testing[1] = 'u';
	show(testing);
	show(testing, 3);
	show("Done!");
	return 0;
}

void set(stringy& beany, char* str)
{
	beany.ct = strlen(str);
	beany.str = new char[beany.ct + 1];
	strcpy(beany.str, str);
}

 

 

5번

#include<iostream>
template <class T>
T max(T a[]);

int main()
{
	int i_max,a[5] = { 3,4,1,7,4 };
	double d_max,b[5] = { 2.4,5.5,4.3,1.3,6.4 };

	i_max = max(a);
	d_max = max(b);

	std::cout << i_max << std::endl
		<< d_max << std::endl;

	return 0;
}


template <class T>
T max(T a[])
{
	T max = a[0];
	for (int i = 1; i < 5; i++)
		if (max < a[i])
			max = a[i];
	return max;
}

 

 

6번

#include<iostream>
#include<cctype>
using namespace std;

template <class T>
T maxn(T a[], int n);

template<> char* maxn(char* a[], int n);

int main()
{
	int int_max,a[6] = { 2,5,3,5,1,4 };
	double double_max,b[4] = { 1.4,3.5,4.2,3.4 };
	char* c[5] = {
		"aasdefdasssdda",
		"ddsss",
		"aaeessddffeeff",
		"eeeeerrrrrtttttqqqqq",
		"qqqqqwwwwweeeeerrrrr"
	};
	char* char_max;

	int_max = maxn(a, 6);
	double_max = maxn(b, 4);
	char_max = maxn(c, 5);

	cout << int_max << endl
		<< double_max << endl
		<< char_max << endl;

	return 0;
}

template <class T>
T maxn(T a[], int n)
{
	T max = a[0];
	for (int i = 1; i < n; i++)
		if (max < a[i])
			max = a[i];
	return max;
}

template<> char* maxn(char* a[], int n)
{
	char* max = a[0];
	for (int i = 1; i < n; i++)
		if (strlen(max) < strlen(a[i]))
			max = a[i];
	return max;
}

 

 

7번

#include <iostream>

template <typename T>            
T ShowArray(T arr[], int n);

template <typename T>           
T ShowArray(T* arr[], int n);

struct debts
{
    char name[50];
    double amount;
};

int main(void)
{
    using namespace std;
    int things[6] = { 13, 31, 103, 301, 310, 130 };
    struct debts mr_E[3] =
    {
        {"Ima Wolfe", 2400.0},
        {"Ura Foxe", 1300.0},
        {"Iby Stout", 1800.0}
    };
    double* pd[3];
    double sum;

    for (int i = 0; i < 3; i++)
        pd[i] = &mr_E[i].amount;

    cout << "Mr. E의 재산 합계:\n";
    sum = ShowArray(things, 6);  
    cout << sum << endl;
    cout << "Mr. E의 채무 합계:\n";
    sum = ShowArray(pd, 3);      
    cout << sum << endl;
    return 0;
}

template <typename T>
T ShowArray(T arr[], int n)
{
    using namespace std;
    T sum = 0;
    for (int i = 0; i < n; i++)
        sum += arr[i];
    return sum;
}

template <typename T>
T ShowArray(T* arr[], int n)
{
    using namespace std;
    T sum = 0;
    for (int i = 0; i < n; i++)
        sum += *arr[i];
    return sum;
}