hdu 3477 Temperature

/*原来物理在ACM上也有应用的，有关积分的题目真的是几乎没有做过的一直到比赛的最后才AC的，纠结的说牛顿的冷却定理是参考了baidu的，确切的说不是评自己的水平AC的以后看到非线性的方程要想到积分*/#include <iostream>#include <algorithm>#include <cmath>using namespace std;int main(){int t;//freopen("hxsh.in", "r", stdin);scanf("%d", &t);double e = 2.718281828459045;for(int i = 1; i <= t; i++){int ua, u0, u1, t1, n;scanf("%d %d %d %d %d", &ua, &u0, &u1, &t1, &n);double k;if(u0 == ua)// 这里没有处理，一直wrongk = 0;else{double w = 1.0 * (u1 - ua) / (u0 - ua); k = -log10 (w) / log10(e) / t1; // log w }//printf("%0.2lf/n", k);int p, s;printf("Case %d:/n", i);while(n--){scanf("%d %d", &p, &s);if(p == 0){if(s == u0 || u0 == ua){printf("0.00/n");continue;}if(s == u1 || u1 == ua){printf("%.2lf/n", 1.0 *t1);continue;}double b = 1.0 * (s - ua)/ (u0 - ua);double d = (log10 (b)) / (log10 (e));double tt = d / (-k);printf("%0.2lf/n", tt);//printf("/n");}else{double c;c = ua + (u0 - ua) * pow(e, -k * s);printf("%0.2lf/n", c);//printf("/n");}}printf("/n");}return 0;}