3.1想邻数字的基数等比：确定进制

程序如下：

/*
*
*Declaration:The author of <<Accelerated C++>> has wrote in the end of that book: As you look for reading materimal, keep in mind that books on the shelf do not make you a better programmer. Ultimately, the only way to improve your programming is to write programs.	>这些程序来自一些ACM书籍，作者只为提高编程能力，实现书中例题或练习。如有侵权，请联系作者，作者将立即删除。
*
*联系邮箱：mingxinglai#gmail.com
*
*/

#include <stdio.h>
#include <string.h>

long b2ten( char*x, int b)
{
	int ret = 0;
	int len = strlen(x);
	for( int i = 0; i < len; i++)
	{
		if( x[i] - '0' >= b)return -1;
		ret *= b;
		ret += x[i] -'0';
	}
	return (long) ret;
}


	

int main(int argc, char* argv[])
{
	int n;
	char p[8], q[8], r[8];
	long pAlgorism, qAlgorism , rAlgorism;
	int b;
	scanf("%d",&n);
	while( n--)
	{
		scanf("%s%s%s",p,q,r);
		for( b = 2; b <= 16; b++)
		{
			pAlgorism = b2ten(p,b);
			qAlgorism = b2ten(q,b);
			rAlgorism = b2ten(r,b);
			if( pAlgorism == -1 || qAlgorism == -1 || rAlgorism == -1)continue;
			if( pAlgorism * qAlgorism == rAlgorism)
			{ 
				printf("%d\n",b);
				break;
			}
		}
		if( b == 17)printf("0\n");
	}
	return 0;
}