使用if-else将数字转换为单词

在第二个if后面有一个分号;。而且，您应该使用||而不是|。此外，您应该排除ten==1时的情况。

//This program converts number into words
#include<iostream>
using namespace std;
main()
{
int number,unit,ten;
cout<<"Please enter any number between 0-99: ";
cin>>number;
ten=number/10;
unit=number%10;
if(number<0 || number>99)
{
cout<<"Number is out of range";
}
if(ten == 1)
{
if(number==10) cout<<"ten"; 
if(number==11) cout<<"eleven"; 
if(number==12) cout<<"twelve";
if(number==13) cout<<"thirteen"; 
if(number==14) cout<<"fourteen";
if(number==15) cout<<"fifteen";
if(number==16) cout<<"sixteen";
if(number==17) cout<<"seventeen";
if(number==18) cout<<"eighteen";
if(number==19) cout<<"ninteen";
}
else {   
if(ten==2) cout<<"twenty";
if(ten==3) cout<<"thirty";
if(ten==4) cout<<"fourty";
if(ten==5) cout<<"fifty";
if(ten==6) cout<<"sixty";
if(ten==7) cout<<"seventy";
if(ten==8) cout<<"eighty";
if(ten==9) cout<<"ninty";
// ****
if(unit==0 && ten ==0) cout<<" zero";
if(unit==1) cout<<" one";
if(unit==2) cout<<" two";
if(unit==3) cout<<" three";
if(unit==4) cout<<" four";
if(unit==5) cout<<" five";
if(unit==6) cout<<" six";
if(unit==7) cout<<" seven";
if(unit==8) cout<<" eight";
if(unit==9) cout<<" nine";
}
}

所有情况的输出：

Please enter any number between 0-99: -1
Number is out of range
Please enter any number between 0-99: 0
zero
Please enter any number between 0-99: 1
one
Please enter any number between 0-99: 2
two
Please enter any number between 0-99: 3
three
Please enter any number between 0-99: 4
four
Please enter any number between 0-99: 5
five
Please enter any number between 0-99: 6
six
Please enter any number between 0-99: 7
seven
Please enter any number between 0-99: 8
eight
Please enter any number between 0-99: 9
nine
Please enter any number between 0-99: 10
ten
Please enter any number between 0-99: 11
eleven
Please enter any number between 0-99: 12
twelve
Please enter any number between 0-99: 13
thirteen
Please enter any number between 0-99: 14
fourteen
Please enter any number between 0-99: 15
fifteen
Please enter any number between 0-99: 16
sixteen
Please enter any number between 0-99: 17
seventeen
Please enter any number between 0-99: 18
eighteen
Please enter any number between 0-99: 19
ninteen
Please enter any number between 0-99: 20
twenty
Please enter any number between 0-99: 21
twenty one
Please enter any number between 0-99: 22
twenty two
Please enter any number between 0-99: 23
twenty three
Please enter any number between 0-99: 24
twenty four
Please enter any number between 0-99: 25
twenty five
Please enter any number between 0-99: 26
twenty six
Please enter any number between 0-99: 27
twenty seven
Please enter any number between 0-99: 28
twenty eight
Please enter any number between 0-99: 29
twenty nine
Please enter any number between 0-99: 30
thirty
Please enter any number between 0-99: 31
thirty one
Please enter any number between 0-99: 32
thirty two
Please enter any number between 0-99: 33
thirty three
Please enter any number between 0-99: 34
thirty four
Please enter any number between 0-99: 35
thirty five
Please enter any number between 0-99: 36
thirty six
Please enter any number between 0-99: 37
thirty seven
Please enter any number between 0-99: 38
thirty eight
Please enter any number between 0-99: 39
thirty nine
Please enter any number between 0-99: 40
fourty
Please enter any number between 0-99: 41
fourty one
Please enter any number between 0-99: 42
fourty two
Please enter any number between 0-99: 43
fourty three
Please enter any number between 0-99: 44
fourty four
Please enter any number between 0-99: 45
fourty five
Please enter any number between 0-99: 46
fourty six
Please enter any number between 0-99: 47
fourty seven
Please enter any number between 0-99: 48
fourty eight
Please enter any number between 0-99: 49
fourty nine
Please enter any number between 0-99: 50
fifty
Please enter any number between 0-99: 51
fifty one
Please enter any number between 0-99: 52
fifty two
Please enter any number between 0-99: 53
fifty three
Please enter any number between 0-99: 54
fifty four
Please enter any number between 0-99: 55
fifty five
Please enter any number between 0-99: 56
fifty six
Please enter any number between 0-99: 57
fifty seven
Please enter any number between 0-99: 58
fifty eight
Please enter any number between 0-99: 59
fifty nine
Please enter any number between 0-99: 60
sixty
Please enter any number between 0-99: 61
sixty one
Please enter any number between 0-99: 62
sixty two
Please enter any number between 0-99: 63
sixty three
Please enter any number between 0-99: 64
sixty four
Please enter any number between 0-99: 65
sixty five
Please enter any number between 0-99: 66
sixty six
Please enter any number between 0-99: 67
sixty seven
Please enter any number between 0-99: 68
sixty eight
Please enter any number between 0-99: 69
sixty nine
Please enter any number between 0-99: 70
seventy
Please enter any number between 0-99: 71
seventy one
Please enter any number between 0-99: 72
seventy two
Please enter any number between 0-99: 73
seventy three
Please enter any number between 0-99: 74
seventy four
Please enter any number between 0-99: 75
seventy five
Please enter any number between 0-99: 76
seventy six
Please enter any number between 0-99: 77
seventy seven
Please enter any number between 0-99: 78
seventy eight
Please enter any number between 0-99: 79
seventy nine
Please enter any number between 0-99: 80
eighty
Please enter any number between 0-99: 81
eighty one
Please enter any number between 0-99: 82
eighty two
Please enter any number between 0-99: 83
eighty three
Please enter any number between 0-99: 84
eighty four
Please enter any number between 0-99: 85
eighty five
Please enter any number between 0-99: 86
eighty six
Please enter any number between 0-99: 87
eighty seven
Please enter any number between 0-99: 88
eighty eight
Please enter any number between 0-99: 89
eighty nine
Please enter any number between 0-99: 90
ninty
Please enter any number between 0-99: 91
ninty one
Please enter any number between 0-99: 92
ninty two
Please enter any number between 0-99: 93
ninty three
Please enter any number between 0-99: 94
ninty four
Please enter any number between 0-99: 95
ninty five
Please enter any number between 0-99: 96
ninty six
Please enter any number between 0-99: 97
ninty seven
Please enter any number between 0-99: 98
ninty eight
Please enter any number between 0-99: 99
ninty nine
Please enter any number between 0-99: 100
Number is out of range

1. 您应该使用int main()而不是main()，并在int main()中添加return 0;
2. 线路if(number<0 | number>99)应为if(number<0 || number>99)
3. 线路if(number>=11 && number <=19);应为if(number>=11 && number <=19)
4. 在if(ten>=2 && ten<=9)之前应添加else

以下code可以工作：

//This program converts number into words
#include<iostream>
using namespace std;
int main()
{
int number,unit,ten;
cout<<"Please enter any number between 0-99: ";
cin>>number;
ten=number/10;
unit=number%10;
if(number<0 || number>99)
cout<<"Number is out of range";
if(number>=11 && number <=19)
{
if(number==11) cout<<"eleven";
if(number==12) cout<<"twelve";
if(number==13) cout<<"thirteen";
if(number==14) cout<<"fourteen";
if(number==15) cout<<"fifteen";
if(number==16) cout<<"sixteen";
if(number==17) cout<<"seventeen";
if(number==18) cout<<"eighteen";
if(number==19) cout<<"ninteen";
} else {
if(ten>=2 && ten<=9)
{
if(ten==1) cout<<"ten";
if(ten==2) cout<<"twenty";
if(ten==3) cout<<"thirty";
if(ten==4) cout<<"fourty";
if(ten==5) cout<<"fifty";
if(ten==6) cout<<"sixty";
if(ten==7) cout<<"seventy";
if(ten==8) cout<<"eighty";
if(ten==9) cout<<"ninty";
}
if(unit>=0 && unit <=9)
{
if(unit==0) cout<<" zero";
if(unit==1) cout<<" one";
if(unit==2) cout<<" two";
if(unit==3) cout<<" three";
if(unit==4) cout<<" four";
if(unit==5) cout<<" five";
if(unit==6) cout<<" six";
if(unit==7) cout<<" seven";
if(unit==8) cout<<" eight";
if(unit==9) cout<<" nine";
}
}
return 0;
}

由于您的if条件，您得到的实际上是正确的。如果你写下3个if条件，它会检查其中的三个。另外，去掉第二个if上的分号！

所以第一个，12，进入第一个if并打印"十二"。

转到第二个if。12/10是1.2，所以作为int，它是`1。它不在第二个if中。由于分号的原因，它无论如何都不在。

但它进入了第三个阶段：12%10。

这就是你在ifs中所拥有的！

此外，我担心这对您有效：if(number<0 | number>99)，因为它应该是||，而不是|。

对于这样的情况，switch语句更有意义。试试这个代码：

#include<iostream>
using namespace std;
int main()
{
for (int number = 1; number <= 99; number++)
{
int ten=number/10;
int unit=number%10;
if(number<0 || number>99)
{
cout<<"Number is out of range";
return 1;
}
if(ten == 1)
{
switch ( number )
{
case 10: cout<<"ten"; break;
case 11: cout<<"eleven"; break;
case 12: cout<<"twelve"; break;
case 13: cout<<"thirteen"; break;
case 14: cout<<"fourteen"; break;
case 15: cout<<"fifteen"; break;
case 16: cout<<"sixteen"; break;
case 17: cout<<"seventeen"; break;
case 18: cout<<"eighteen"; break;
case 19: cout<<"nineteen"; break;
}
}
else
{
if(ten>=2 && ten<=9)    
{   
switch (ten)
{
case 2: cout<<"twenty"; break;
case 3: cout<<"thirty"; break;
case 4: cout<<"fourty"; break;
case 5: cout<<"fifty"; break;
case 6: cout<<"sixty"; break;
case 7: cout<<"seventy"; break;
case 8: cout<<"eighty"; break;
case 9: cout<<"ninty"; break;
}
}
if ( unit != 0 and ten != 0 )
{
cout << " ";
}
switch ( unit )
{
case 0: if ( ten == 0 ) cout<<"zero"; break;
case 1: cout<<"one"; break;
case 2: cout<<"two"; break;
case 3: cout<<"three"; break;
case 4: cout<<"four"; break;
case 5: cout<<"five"; break;
case 6: cout<<"six"; break;
case 7: cout<<"seven"; break;
case 8: cout<<"eight"; break;
case 9: cout<<"nine"; break;
}
}
cout << "n";
}
return 0;
}

我还发现了以下错误：

1. 在第一个if语句中使用按位或|，而不是布尔值或||。在打印"Number is out of range"之后，您也不会停止代码的其余部分，我已经通过返回修复了这一问题
2. 在第二个if语句的末尾有一个分号，这个if语句也可以简化为ten == 1
3. 您需要防止其余代码在打印"青少年"后运行，这可以用else来完成
4. 你永远不会打印"ten"，它可能应该打印"青少年"，但打印的是20、30等，但由于周围的if语句，它永远不会真正打印出来
5. 在20、30等之后打印"零"。如果ten是0，则仅打印"zero"可以修复此问题
6. if语句if(unit>=0 && unit <=9)将始终为true，因此可以删除