@ sarnold わかりました。これが私のアップデートです。あなたがくれたガイドに従ってみました。プロトタイプを型に移動するメインを削除しようとしましたが、それぞれを 1 つだけにして、個々の関数ごとに宣言を含む 1 つの int メインに絞り込み、代わりに void を使用しました。関数ごとに int を使用することをお勧めします。
#include <iostream>
#include <cmath>
#include <stdio.h>
#include <string>
using namespace std;
void function1()
{
//Enter Variables
int number;
cout << "Enter Variable a: ";
cin >> number;
int a = number;
cout << "Enter Variable b: ";
cin >> number;
int b = number;
cout << "Enter Variable c: ";
cin >> number;
int c = number;
if (a > b && a > c);
return a;
cout << "This is your highest number(" << a << ")";
if (b > a && b > c);
return b;
cout << "This is your highest number(" << b << ")";
if (c > a && c > B);
return c;
cout << "This is your highest number(" << c << ")";
}
void function2()
{
// Prompt User for Integer
int number;
cout << "Enter integer 1: ";
cin >> number;
int a = number;
cout << "Enter integer 2: ";
cin >> number;
int b = number;
if (a != B)
cout << "Continue";
else
cout << "Number 1 or 2 is the same!";
cout << "Enter integer 3: ";
cin >> number;
int c = number;
if ((a != B) != c)
cout << "Continue";
else
cout << "Number 3 is the same as number 1 or 2!";
cout << "Enter integer 4: ";
cin >> number;
int d = number;
if (((a != B) != c) != d)
cout << "numbers are all different";
else
cout << "Number 3 is the same as number 1, 2, or 3!";
cout << "Thank you enter another number?\n\n";
cin >> number;
return 0;
}
std::string numerals = "VXLCDM";
void function3()
{
char roman_Numeral;
int arabic_Numeral = 0;
cout << "Enter the Roman Numeral in Capital letters (e.g. CCXIX) : ";
while(cin.get(roman_Numeral))
{
if(roman_Numeral == 'M')
arabic_Numeral = arabic_Numeral + 1000;
else if(roman_Numeral == 'D')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral, 5) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 500;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 500;
continue;
}
}
else if(roman_Numeral == 'C')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral, 4) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 100;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 100;
continue;
}
}
else if(roman_Numeral == 'L')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral, 3) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 50;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 50;
continue;
}
}
else if(roman_Numeral == 'X')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral, 2) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 10;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 10;
continue;
}
}
else if(roman_Numeral == 'V')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral, 1) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 5;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 5;
continue;
}
}
else if(roman_Numeral == 'I')
{
roman_Numeral = cin.peek();
if(numerals.find(roman_Numeral) != std::string::npos)
{
arabic_Numeral = arabic_Numeral - 1;
continue;
}
else
{
arabic_Numeral = arabic_Numeral + 1;
continue;
}
}
else
break;
}
cout << arabic_Numeral << endl;
return 0;
}
void input (double &);
void convert (double radius, int & feet, double & total);
void output (int, double, double);
void function4()
{
double total, radius;
int feet;
char yn;
do
{
input (radius);
convert (radius, feet, total);
output (feet, total, radius);
cout << "Enter a Different radius? (y or n)\n";
cin >> yn;
cout << "\n\n";
}
while (yn == 'y' || yn == 'Y');
system("pause");
return 0;
}
void input(double & radius)
{
cout << "---------------------------Re Enter Radius-------------------------\n\n";
cout << "Enter Radius:\n";
cin >> radius;
cout << "\n";
}
void convert(double radius, int & feet, double & total)
{
//=======================================================
total = 3.14 * radius * radius * radius * 4 / 3;
}
//========================================================
void output(int feet, double total, double radius)
{
cout << "---------------------------Re Enter Radius-------------------------\n\n";
cout << "The volume is: " << total << " \n\n";
cout << "--------------------------- Equation -------------------------\n\n";
cout << "The Equation with (" << radius << ") being:\n\n";
cout << "4/3 * 3.14 * (" << radius << ")^3 = " << total << "\n\n";
cout << "--------------------------- Again? -------------------------\n\n";
}
void swap( int &x, int &y )
int number;
void function5()
{
cout << "x is ";
cin >> number;
int x = number;
cout << "y is ";
cin >> number;
int y = number;
swap(x, y);
cout << "Swapped the first number is now(" << x << ")and the second is now (" << y >> ")";
return 0;
}
int leap (int year);
void function6 (void){
int month,day,year,dm,dn,leap;
printf("enter the month:");
scanf("%d",&month);
printf("enter the day:");
scanf("%d",&day);
printf("enter the year:");
scanf("%d",&year);
if (leap==0)
{ if(month==1)
dm=0;
if(month==2)
dm=31;
if(month==3)
dm=59;
if(month==4)
dm=90;
if(month==5)
dm=120;
if(month==6)
dm=151;
if(month==7)
dm=181;
if(month==8)
dm=212;
if(month==9)
dm=243;
if(month==10)
dm=273;
if(month==11)
dm=304;
if(month==12)
dm=334;}
else
{ if(month==1)
dm=0;
if(month==2)
dm=31;
if(month==3)
dm=60;
if(month==4)
dm=91;
if(month==5)
dm=121;
if(month==6)
dm=152;
if(month==7)
dm=182;
if(month==8)
dm=213;
if(month==9)
dm=244;
if(month==10)
dm=274;
if(month==11)
dm=304;
if(month==12)
dm=335;}
dn=dm+day;
printf("the day number is :%d",dn);
return 0;
}
int leap (int year){
if((year%100== 0 && year%400==0)|| (year%4==0))
return 1;
else
return 0;}
int main(int argc, char *argv[], int year, int leap, int number, int arabic_Numeral)
{
function1();
function2();
function3();
function4();
function5();
function6();
return 0;
}