C++ 程序来检查给定数是幸运数还是不是(所有数字都不相同)
给定一个数,任务是检查输入的数是幸运数还是不是,并将结果显示出来。
什么是幸运数
幸运数是每个数字都不同的数,如果至少有一个数字重复,那么该数将不被视为幸运数。
示例
Input-: n = 1234 Output-: it is a lucky number Explanation-: As there is no repeating digit in a number n so it is a lucky number Input-: n = 3434 Output-: it is not a lucky number Explanation-: In the given number n, 3 and 4 are repeating twice so it is not a lucky number
我们对给定程序所采取的方法如下 −
- 从用户处输入数字 n,以检查它是否是幸运数
- 遍历所有数字,直到数字大小
- 标记访问过的数字,并在每次访问时检查它是否已经发现
- 显示给定的数字是幸运数还是不是
算法
Start
Step1-> declare function to check whether a given number is lucky or not
bool check_lucky(int size)
declare bool arr[10]
Loop For int i=0 and i<10 and i++
Set arr[i] = false
End
Loop While(size > 0)
declare int digit = size % 10
IF (arr[digit])
return false
End
set arr[digit] = true
Set size = size/10
End
return true
Step 2-> In main()
Declare int arr[] = {0,34,2345,1249,1232}
calculate int size = sizeof(arr)/sizeof(arr[0])
Loop For int i=0 and i<size and i++
check_lucky(arr[i])?
print is Lucky : print is not Lucky
End
Stop示例
#include<iostream>
using namespace std;
//return true if a number if lucky.
bool check_lucky(int size) {
bool arr[10];
for (int i=0; i<10; i++)
arr[i] = false;
while (size > 0) {
int digit = size % 10;
if (arr[digit])
return false;
arr[digit] = true;
size = size/10;
}
return true;
}
int main() {
int arr[] = {0,34,2345,1249,1232};
int size = sizeof(arr)/sizeof(arr[0]);
for (int i=0; i<size; i++)
check_lucky(arr[i])? cout << arr[i] << " is Lucky \n": cout << arr[i] << " is not Lucky \n";
return 0;
}输出
19 is Lucky 34 is Lucky 2345 is Lucky 1249 is Lucky 1232 is not Lucky
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