1つの自然数の7進数式は1つの3桁で、この自然数の9進数式も1つの3桁で、しかもこの2つの3桁のデジタルの順序はちょうど反対です.
1987 ワード
筋道がはっきりしていて、パッケージが合理的で、テストが完全で、linux GCC
#include
typedef enum boolean{FALSE, TRUE}BOOL;
//this function is to find a natural num within 3,whoes
//7 decimal is the reverse to 9 decimal.
//function to calculate a Natural num to a decimal low euqal than 10.
//num the num that to be dealed.
//whichDecimal what type of data you want such as HEX OCT or binary.
int ExchangeDecimal(int num, int whichDecimal)
{
int tmp = 0;
int multiRate = 1;
while(num > whichDecimal)
{
tmp += (num % whichDecimal)*multiRate;
num = num / whichDecimal;
multiRate *=10;
}
tmp += num * multiRate;
return tmp;
}
//reverse num
int ReverseNum(int num)
{
int cookData = 0;
while(num > 0)
{
cookData *= 10;
cookData += (num%10);
num = num / 10;
}
return cookData;
}
//find the num and print the num
//num to be dealed ,num no big than 999 is required.
BOOL FindData(int num)
{
int sevenDecimal = 0;
int nineDecimal = 0;
int reverseNum = 0;
//first calculate the targetdecimal;
sevenDecimal = ExchangeDecimal(num, 7);
nineDecimal = ExchangeDecimal(num, 9);
//7 Decimal and 9 decimal not big than 999
if(sevenDecimal>777 || nineDecimal >999)
return FALSE;
//reverse 9decimal
reverseNum = ReverseNum(nineDecimal);
if(sevenDecimal == reverseNum)
printf("%d
",num);
else return FALSE;
}
int main(int argc, char **argv)
{
if(argc < 3)
{
printf("Usage:
./a.out num decimal
");
return;
}
int num = atoi(argv[1]);
int dec = atoi(argv[2]);
printf("The input: %d
The Dec: %d",num,dec);
printf("The output: %d
",ExchangeDecimal(num,dec));
printf("The reverse %d is %d
",num,ReverseNum(num));
int i = 999;
while(i)
{
FindData(i);
i--;
}
return 0;
}