1
#include <iostream>
double num(double x, double y);
int main()
{
using namespace std;
double n, m;
cout << "请输入2个数[0退出]: ";
while ((cin >> n >> m) && (n != 0 && m != 0))
{
cout << n << " " << m << " 调和平均数: " << num(n, m) << endl;
cout << "请输入2个数[0退出]: ";
}
system("pause");
return 0;
}
double num(double x, double y)
{
return (2.0*x*y / (x + y));
}
2
#include <iostream>
using namespace std;
int innum(double ar[], int n);
void show(double ar[], int n);
void average(double ar[], int n);
int main()
{
const int size = 10;
double num[size];
int n = innum(num, size);
show(num, n);
average(num, n);
system("pause");
return 0;
}
int innum(double ar[], int n)
{
int i;
for (i = 0; i < n; i++)
{
cout << "请输入第 " << i + 1 << " 个高尔夫成绩[q退出]: ";
double num;
if (!(cin >> num))
break;
ar[i] = num;
}
return i;
}
void show(double ar[], int n)
{
cout << "****高尔夫成绩****\n";
for (int i = 0; i < n; i++)
cout << i + 1 << " : " << ar[i] << endl;
}
void average(double ar[], int n)
{
double tot = 0;
for (int i = 0; i < n; i++)
tot += ar[i];
cout << "平均成绩: " << tot / n << endl;
}
3
#include <iostream>
using namespace std;
struct box
{
char maker[40];
float height;
float width;
float length;
float volume;
};
void show(box pst);
void compute(box *pst);
int main()
{
box Box = { "索尼 Ps4",39,288,265 };
cout.precision(20);
compute(&Box);
show(Box);
system("pause");
return 0;
}
void compute(box *pst)
{
pst->volume = pst->height*pst->width*pst->length;
}
void show(box pst)
{
cout << pst.maker << " " << pst.length << " " << pst.width << " " << pst.height << " " << pst.volume << endl;
}
4
#include <iostream>
long double odds(int n, int m);
int main()
{
using namespace std;
long double A_chance, B_chance;
A_chance = odds(47, 5);
B_chance = odds(27, 1);
cout << "中奖几率: " << A_chance * B_chance << endl;
cout << "完成.\n";
system("pause");
return 0;
}
long double odds(int n, int m)
{
long double chance = 1.0;
double i, j;
for (i = n, j = m; j > 0; i--, j--)
chance *= i / j;
return chance;
}
5
#include <iostream>
using namespace std;
long long factorial(long long n);
int main()
{
long long n;
while ((cin >> n) && (n > 0))
cout << n << "! = " << factorial(n) << endl;
system("pause");
return 0;
}
long long factorial(long long n)
{
if (n == 0)
return 1;
return (n * factorial(n - 1));
}
6
#include <iostream>
#include <array>
#define SIZE 10
using namespace std;
int Fill_array(double ar[], int n);
void Show_array(const double ar[], int n);
void Reverse_array(double ar[], int n);
int main()
{
double num[SIZE];
int count;
count = Fill_array(num, SIZE);
Show_array(num, count);
Reverse_array(num, count);
Show_array(num, count);
cout.put('\n');
system("pause");
return 0;
}
int Fill_array(double ar[], int n)
{
double temp;
int count = 0;
for (int i = 0; i < n; i++)
{
cout << "请输入第 " << i + 1 << " 个数: ";
if (!(cin >> temp))
break;
ar[i] = temp;
count++;
}
return count;
}
void Show_array(const double ar[], int n)
{
cout << "\n*****显示内容*****\n";
for (int i = 0; i < n; i++)
{
cout << ar[i] << " ";
}
}
void Reverse_array(double ar[], int n)
{
double temp;
for (int i = 1; i < (n / 2); i++)
{
temp = ar[i];
ar[i] = ar[n - 1 - i];
ar[n - 1 - i] = temp;
}
}
7
#include <iostream>
const int Max = 5;
double *fill_array(double *ar, double *end);
void show_array(const double *ar, double *end);
void revalue(double r, double *ar, double *end);
int main()
{
using namespace std;
double properties[Max];
double *End = fill_array(properties, properties + Max);
show_array(properties, End);
if (End != properties)
{
cout << "输入重估系数: ";
double factor;
while (!(cin >> factor))
{
cin.clear();
while (cin.get() != '\n')
continue;
cout << "输入错误, 请输入一个数字: ";
}
revalue(factor, properties, End);
show_array(properties, End);
}
cout << "完成.\n";
system("pause");
return 0;
}
double *fill_array(double *ar, double *end)
{
using namespace std;
double temp;
double *fp = ar;
int i = 1;
while (ar != end)
{
cout << "输入值 #" << i++ << ": ";
cin >> temp;
if (!cin)
{
cin.clear();
while (cin.get() != '\n')
continue;
cout << "输入错误, 请输入一个数字: \n";
break;
}
else if (temp < 0)
break;
*ar++ = temp;
fp = ar;
}
return fp;
}
void show_array(const double *ar, double *end)
{
using namespace std;
int i = 1;
while (ar!=end)
{
cout << "财产 #" << i++ << ": $";
cout << *ar++ << endl;
}
}
void revalue(double r, double *ar, double *end)
{
while (ar != end)
*ar++ *= r;
}
8
a
#include <iostream>
#include <string>
const int Seasons = 4;
const char *Snames[] =
{ "春季", "夏季", "秋季", "冬季" };
void fill(double *ar, int n);
void show(const double *ar, int n);
int main()
{
using namespace std;
double expenses[Seasons];
fill(expenses, Seasons);
show(expenses, Seasons);
system("pause");
return 0;
}
void fill(double *ar, int n)
{
for (int i = 0; i < n; i++)
{
std::cout << "输入 " << Snames[i] << " 花费: ";
std::cin >> ar[i];
}
}
void show(const double *ar, int n)
{
double total = 0.0;
std::cout << "\n花费\n";
for (int i = 0; i < n; i++)
{
std::cout << Snames[i] << ": $" << ar[i] << '\n';
total += ar[i];
}
std::cout << "总计: $" << total << '\n';
}
b
#include <iostream>
#include <string>
const int Seasons = 4;
const char *Snames[] =
{ "春季", "夏季", "秋季", "冬季" };
struct expenses
{
double Expenses;
};
void Fill(expenses *pst, int n);
void show(expenses *pst, int n);
int main()
{
using namespace std;
expenses list[Seasons];
Fill(list, Seasons);
show(list, Seasons);
system("pause");
return 0;
}
void Fill(expenses *pst, int n)
{
for (int i = 0; i < n; i++)
{
std::cout << "输入 " << Snames[i] << " 花费: ";
std::cin >> pst[i].Expenses;
}
}
void show(expenses *pst, int n)
{
double total = 0.0;
std::cout << "\n花费\n";
for (int i = 0; i < n; i++)
{
std::cout << Snames[i] << ": $" << pst[i].Expenses << '\n';
total += pst[i].Expenses;
}
std::cout << "总计: $" << total << '\n';
}
