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; }