c++ - 圣诞节 12 天，不循环

Question

我是一个相当弱的程序员，并得到了以下信息。我设置了语句，我可以在完成后清理它，但是例如，当用户输入“6”时，它将遍历第 1 节到第 6 节。

#include<iostream>

using namespace std;

int main()
{
int input;

cout << "Please enter a number from 1-12, USE '999' to close." << endl;
cin >> input;

for (int input = 1; input <= 12; input++)
{

    if (input == 1)
    {
        cout << "\nOn the 1st day of Christmas my true love gave to me,\n A Partridge in a Pear Tree." << endl;
    }

    else if (input == 2)
    {
        cout << "\nOn the 2nd day of Christmas my true love gave to me :\nTwo Turtle Doves,\n And a Partridge in a Pear Tree." << endl;
    }
    else if (input == 3)
    {
        cout << "\n\nOn the 3rd day of Christmas my true love gave to me,";
        cout << "Three French Hens\nTwo Turtle Doves,\nAnd a Partridge in a Pear Tree." << endl;
    }
    else if (input == 4)
    {
        cout << "\n\nOn the fourth day of Christmas my true love sent to me :\n";
        cout << "four Calling Birds\n3 French Hens\n2 Turtle Doves\nand a Partridge in a Pear Tree" << endl;
    }
    else if (input == 5)
    {
        cout << "\n\nOn the fifth day of Christmas my true love sent to me:\n";
        cout << " FIVE GOLDEN RINGS!, Four Calling Birds, three French Hens, 2 turtle doves\n";
        cout << "And a partridge in a pear tree.";
    }
    else if (input == 6)
    {
        cout << "\n\nOn the sixth day of Christmas my true love sent to me :\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves\nand a Partridge in a Pear Tree\n";
    }
    else if (input == 7)
    {
        cout << "\n\nOn the seventh day of Christmas my true love sent to me :\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves\nand a Partridge in a Pear Tree\n";
    }
    else if (input == 8)
    {
        cout << "\n\nOn the eigth day of Christmas my true love sent to me :\n8 maids are milking,\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves\nand a Partridge in a Pear Tree\n";

    }
    else if (input == 9)
    {
        cout << "\n\nOn the nineth day of Christmas my true love sent to me :\n9 ladies dancing,\n8 maids are milking,\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves \nand a Partridge in a Pear Tree\n";

    }
    else if (input == 10)
    {
        cout << "\n\nOn the tenth day of Christmas my true love sent to me :\n10 lords a leaping,\n9 ladies dancing,\n8 maids are milking,\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves \n and a Partridge in a Pear Tree\n";

    }
    else if (input == 11)
    {
        cout << "\n\nOn the eleventh day of Christmas my true love sent to me :\n11 Pipers piping,\n10 lords a leaping,\n9 ladies dancing,\n8 maids are milking,\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves \nand a Partridge in a Pear Tree\n";

    }
    else if (input == 12)
    {
        cout << "\n\nOn the twevle day of Christmas my true love sent to me :\n12 Drummers Drumming,\n11 Pipers piping,\n10 lords a leaping,\n9 ladies dancing,\n8 maids are milking,\n7 swans are swimming,\n6 Geese a Laying\n5 Golden Rings\n4 Calling Birds\n3 French Hens\n2 Turtle Doves\n and a Partridge in a Pear Tree\n";

    }
    else if (input == 999)
    {
        cout << "Thanks, Good bye!";
        return 0;
    }
    else
    {
        cout << "Terminating program";
        return 0;
    }
}
system("pause");
return 0;
}

谢谢大家

Answer 1

改变for循环中的变量。当用户对输入变量进行输入时，您输入的变量在for循环中发生了变化，所以只需使用其他变量

int main()
{
int input;

cout << "Please enter a number from 1-12, USE '999' to close." << endl;
cin >> input;

for (int x = 1; x <= 12; x++)
{
 // bla bla bla