我的问题是，即使我的计算是正确的，它显示的输出也是错误的。这里唯一正确的是“小时”，但“日、周、月”输出是错误的，它总是达不到正确的答案。
const double FACTOR_RATE = 0.0097822; // PHP per watt-hour
case 1:
watts = 3950;
applianceName = "A/C Floor Stand non inverter 4.5 HP";
cout << "You chose 1. A/C Floor Stand non inverter 4.5HP 3950 watts" << endl;
break;
costPerHour = watts * FACTOR_RATE; // PHP per hour
costPerDay = costPerHour * hoursPerDay; // PHP per day
costPerWeek = costPerDay * daysPerWeek; // PHP per week
costPerMonth = costPerWeek * weeksPerMonth; // PHP per month
这是我的代码的完整视图。
#include <iostream>
#include <iomanip>
#include <string>
#include <limits> // For numeric_limits
using namespace std;
// Function to validate integer input within a specific range
int validateInput(int min, int max, const string& prompt) {
int value;
while (true) {
cout << prompt;
cin >> value;
// Check for input failure (e.g., non-integer input)
if (cin.fail()) {
cin.clear(); // Clear the error flag
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // Discard invalid input
cout << "Invalid input. Please enter an integer value." << endl;
continue;
}
// Check if the input is within the valid range
if (value < min || value > max) {
cout << "Invalid input. Please enter a value between " << min << " and " << max << "." << endl;
continue;
}
// Valid input
cin.ignore(numeric_limits<streamsize>::max(), '\n'); // Discard any remaining input
return value;
}
}
int main() {
// Constants
const double FACTOR_RATE = 0.0097822; // PHP per watt-hour
// Variables for login
string username, password;
// Variables for menu choices
char mainChoice;
int categoryChoice;
// Variables for appliance details
double watts = 0.0;
string applianceName = "";
// Variables for usage inputs
int hoursPerDay, daysPerWeek, weeksPerMonth;
// Variables for cost calculations
double costPerHour, costPerDay, costPerWeek, costPerMonth;
// ------------------------------
// Simple Login Section
// ------------------------------
cout << "Welcome to Meralco Electricity Calculator" << endl;
cout << "Log In" << endl;
cout << "Enter your username: ";
cin >> username;
cout << "Enter your password: ";
cin >> password;
cout << "-----------------------------" << endl;
cout << "Hello, " << username << "!" << endl << endl;
// ------------------------------
// Main Menu Section
// ------------------------------
cout << "To begin the calculation, choose one of the categories below." << endl;
cout << "A. Airconditioner" << endl;
cout << "B. Computer and Gadgets" << endl;
cout << "C. Kitchen Appliances" << endl;
cout << "Enter your choice (A/B/C): ";
cin >> mainChoice;
cout << endl;
// Convert mainChoice to uppercase for consistency
mainChoice = toupper(mainChoice);
// ------------------------------
// Category Selection Section
// ------------------------------
switch (mainChoice) {
case 'A':
cout << "You chose Airconditioner" << endl;
cout << "1. A/C Floor Stand non inverter 4.5HP 3950 watts" << endl;
cout << "2. A/C Floor Split type inverter 1.00 HP 800 watts" << endl;
cout << "3. A/C Floor Split type inverter 1.50 HP 1100 watts" << endl;
cout << "4. A/C Floor Split type inverter 2.0 HP 1500 watts" << endl;
cout << "5. A/C Floor Split type inverter 2.50HP 2300 watts" << endl;
cout << "Enter the airconditioner category (1-5): ";
cin >> categoryChoice;
cout << endl;
switch (categoryChoice) {
case 1:
watts = 3950;
applianceName = "A/C Floor Stand non inverter 4.5 HP";
cout << "You chose 1. A/C Floor Stand non inverter 4.5HP 3950 watts" << endl;
break;
case 2:
watts = 800;
applianceName = "A/C Floor Split type inverter 1.00 HP";
cout << "You chose 2. A/C Floor Split type inverter 1.00 HP 800 watts" << endl;
break;
case 3:
watts = 1100;
applianceName = "A/C Floor Split type inverter 1.50 HP";
cout << "You chose 3. A/C Floor Split type inverter 1.50 HP 1100 watts" << endl;
break;
case 4:
watts = 1500;
applianceName = "A/C Floor Split type inverter 2.0 HP";
cout << "You chose 4. A/C Floor Split type inverter 2.0 HP 1500 watts" << endl;
break;
case 5:
watts = 2300;
applianceName = "A/C Floor Split type inverter 2.50HP";
cout << "You chose 5. A/C Floor Split type inverter 2.50HP 2300 watts" << endl;
break;
default:
cout << "Enter correct number." << endl;
return 0;
}
break;
case 'B':
cout << "You chose Computer and Gadgets" << endl;
cout << "1. Printer 478 watts" << endl;
cout << "2. Router 110 watts" << endl;
cout << "3. Scanner 11 watts" << endl;
cout << "4. Laptop 60 watts" << endl;
cout << "5. Desktop Standard 65 watts" << endl;
cout << "Enter the computer or gadget category (1-5): ";
cin >> categoryChoice;
cout << endl;
switch (categoryChoice) {
case 1:
watts = 478;
applianceName = "Printer";
cout << "You chose 1. Printer 478 watts" << endl;
break;
case 2:
watts = 110;
applianceName = "Router";
cout << "You chose 2. Router 110 watts" << endl;
break;
case 3:
watts = 11;
applianceName = "Scanner";
cout << "You chose 3. Scanner 11 watts" << endl;
break;
case 4:
watts = 60;
applianceName = "Laptop";
cout << "You chose 4. Laptop 60 watts" << endl;
break;
case 5:
watts = 65;
applianceName = "Desktop Standard";
cout << "You chose 5. Desktop Standard 65 watts" << endl;
break;
default:
cout << "Enter correct number." << endl;
return 0;
}
break;
case 'C':
cout << "You chose Kitchen Appliances" << endl;
cout << "1. Induction cooker 1500 watts" << endl;
cout << "2. Refrigerator French 193 watts" << endl;
cout << "3. Rice cooker 3L 1000 watts" << endl;
cout << "4. Washing Machine FrontLoad 2000 watts" << endl;
cout << "5. Smart LED 15 watts" << endl;
cout << "Enter the kitchen appliance category (1-5): ";
cin >> categoryChoice;
cout << endl;
switch (categoryChoice) {
case 1:
watts = 1500;
applianceName = "Induction cooker";
cout << "You chose 1. Induction cooker 1500 watts" << endl;
break;
case 2:
watts = 193;
applianceName = "Refrigerator French";
cout << "You chose 2. Refrigerator French 193 watts" << endl;
break;
case 3:
watts = 1000;
applianceName = "Rice cooker 3L";
cout << "You chose 3. Rice cooker 3L 1000 watts" << endl;
break;
case 4:
watts = 2000;
applianceName = "Washing Machine FrontLoad";
cout << "You chose 4. Washing Machine FrontLoad 2000 watts" << endl;
break;
case 5:
watts = 15;
applianceName = "Smart LED";
cout << "You chose 5. Smart LED 15 watts" << endl;
break;
default:
cout << "Enter correct number." << endl;
return 0;
}
break;
default:
cout << "Enter correct number." << endl;
return 0;
}
cout << "-----------------------------" << endl;
// ------------------------------
// Input Usage Details Section
// ------------------------------
// Validate hours per day (0-24)
hoursPerDay = validateInput(0, 24, "Enter the number of hours used per day: ");
// Validate days per week (1-7)
daysPerWeek = validateInput(1, 7, "Enter the number of days used per week (1-7): ");
// Validate weeks per month (1-4)
weeksPerMonth = validateInput(1, 4, "Enter the number of weeks used per month (1-5): ");
cout << "-----------------------------" << endl << endl;
// ------------------------------
// Cost Calculation Section
// ------------------------------
// Calculate cost based on watt-hours
costPerHour = watts * FACTOR_RATE; // PHP per hour
costPerDay = costPerHour * hoursPerDay; // PHP per day
costPerWeek = costPerDay * daysPerWeek; // PHP per week
costPerMonth = costPerWeek * weeksPerMonth; // PHP per month
// ------------------------------
// Output Results Section
// ------------------------------
cout << fixed << setprecision(2);
cout << "Appliance: " << applianceName << endl;
cout << "Wattage: " << watts << " watts" << endl;
cout << "Usage: " << hoursPerDay << " hours/day for " << daysPerWeek << " days/week and " << weeksPerMonth << " weeks/month" << endl;
cout << "-----------------------------" << endl;
cout << "Cost per hour: PHP " << costPerHour << endl;
cout << "Cost per day: PHP " << costPerDay << endl;
cout << "Cost per week: PHP " << costPerWeek << endl;
cout << "Cost per month: PHP " << costPerMonth << endl;
return 0;
}
我尝试过的样品是
电器：1.空调落地式非逆变器4.5HP 3950瓦 小时：6 天：7 周：4
它始终显示的输出是
时间：38.64 // 唯一正确的答案 // 日：231.84 周：1622.87 月份：6491.47
正确的输出和我期望的是
时间：38.64 日：231.87 周：1623.06 月份：6492.24
您的代码没有错误...
程序执行后，您将看到以下变量
watts = 3950
FACTOR_RATE = 0.0097822
hoursPerDay = 6
因此，对于以下行，
costPerDay = 231.838costPerDay = 231.84cout << fixed << setprecision(2);
为什么你期望不同的结果？
注意：请不要在多个函数中使用
cinmain