1011 World Cup Betting (20 point(s))

1011 World Cup Betting (20 point(s))

With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players from the best teams doing battles for the World Cup trophy in South Africa. Similarly, football betting fans were putting their money where their mouths were, by laying all manner of World Cup bets.

Chinese Football Lottery provided a "Triple Winning" game. The rule of winning was simple: first select any three of the games. Then for each selected game, bet on one of the three possible results -- namely W for win, T for tie, and L for lose. There was an odd assigned to each result. The winner's odd would be the product of the three odds times 65%.

For example, 3 games' odds are given as the following:

 W    T    L
1.1  2.5  1.7
1.2  3.1  1.6
4.1  1.2  1.1

To obtain the maximum profit, one must buy W for the 3rd game, T for the 2nd game, and T for the 1st game. If each bet takes 2 yuans, then the maximum profit would be (4.1×3.1×2.5×65%−1)×2=39.31 yuans (accurate up to 2 decimal places).

Example:

#include<iostream>

using namespace std;

double solve(double bet[])
{
    char choice[] = {'W', 'T', 'L'};
    int max = 0;
    for(int i = 1; i < 3; i++)
        if(bet[i] > bet[max]) max = i;
    cout << choice[max] << ' ';
    return bet[max];
}

int main()
{
    double bets[3][3];
    for(int i = 0; i < 9; i++)
        cin >> (*bets)[i];
    printf("%.2f", (solve(bets[0])*solve(bets[1])*solve(bets[2])*0.65 - 1)*2);
}

思路：

从数组挑选出最大值的下标，然后输出对应数据。