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  • HDU 2105 The Center of Gravity

    http://acm.hdu.edu.cn/showproblem.php?pid=2105

    Problem Description
    Everyone know the story that how Newton discovered the Universal Gravitation. One day, Newton walked 
    leisurely, suddenly, an apple hit his head. Then Newton discovered the Universal Gravitation.From then
    on,people have sovled many problems by the the theory of the Universal Gravitation. What's more, wo also
    have known every object has its Center of Gravity.
    Now,you have been given the coordinates of three points of a triangle. Can you calculate the center 
    of gravity of the triangle?
     
    Input
    The first line is an integer n,which is the number of test cases.
    Then n lines follow. Each line has 6 numbers x1,y1,x2,y2,x3,y3,which are the coordinates of three points.
    The input is terminated by n = 0.
     
    Output
    For each case, print the coordinate, accurate up to 1 decimal places.
     
    Sample Input
    2
    1.0 2.0 3.0 4.0 5.0 2.0
    1.0 1.0 4.0 1.0 1.0 5.0
    0
     
    Sample Output
    3.0 2.7
    2.0 2.3

     代码:

    #include <bits/stdc++.h>
    using namespace std;
    
    int main() {
        int n;
        while(~scanf("%d", &n)) {
            if(n == 0) break;
            for(int i = 1; i <= n; i ++) {
                double x1, y1, x2, y2, x3, y3;
                cin>> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
                double x = 0, y = 0;
                x = 1.0 * (x1 + x2 + x3) / 3;
                y = 1.0 * (y1 + y2 + y3) / 3;
                printf("%.1lf %.1lf
    ", x, y);
            }
        }
        return 0;
    }
    

      

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  • 原文地址:https://www.cnblogs.com/zlrrrr/p/9410883.html
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