[問題] 判斷錯誤??

看板C_and_CPP (C/C++)作者lalawolala (教練我想哭哭)時間15年前 (2009/02/20 00:24)推噓3(3推 0噓 7→)

留言10則, 3人參與討論串1/1

我想計算兩個座標 x1 y1 和 x2 y2 的距離是否大於半徑是的話印出加入成功否的話印出加入失敗在這邊設的半徑為 3 根據距離函式算出來的也是3 不知道為啥怎麼改都還是加入失敗改成小於等於半徑印出加入成功大於印出加入失敗也都是一樣想請問一下哪邊出問題了嗎非常感謝 <(_ _)> #include <cstdlib> #include <iostream> #include <math.h> #define radius 3 using namespace std; bool check_its_point(double , double , double , double ); double distance(double , double , double , double ); int main(int argc, char *argv[]) { // 8.24499, -0.98998 要輸入的數值與 6, 1比較 // 5.75501, 3.98998 要輸入的數值與 6, 1比較 // 7.47141, -1.61438 要輸入的數值與 6, 1比較 if( check_its_point(5.75501, 3.98998 ,6 ,1 ) == true) { cout << "加入成功" << endl; } else { cout << "加入失敗" << endl; } system("PAUSE"); return EXIT_SUCCESS; } bool check_its_point(double x1, double y1, double x2, double y2) { double r = radius; cout << distance(x1, y1, x2, y2 ) << endl; if( distance(x1, y1, x2, y2 ) > r ) { cout << x1 << "," << y1 << "到" << x1 << "," << y2 << "距離大於" << r <<" 不存入" << endl; //cout << x1 << "," << y1 << "到" << x2 << "," << y2 << "距離小於" << r <<" 存入" << endl; return false; } return true; } double distance(double x1, double y1, double x2, double y2) { double distance = 0; distance = sqrt( pow((x2 - x1), 2) + pow((y2 - y1), 2)); cout << "距離 = " << distance << endl; return distance; } -- 柏油->Two-Face ◢~ 你想作什麼? ◢█ ██~ ● 正面就炸你放開那女孩! ◢ ≡ ◥◣ \ 反面炸你家 ▔▔▔▔▔▔▔▔▔ ◣ ▔▔ -◎-⊙- / ◤ ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ -皿 ╭▌ 有時正氣凜然 20080722 pm 18:20左右 ψQSWEET ◣ ︶ ◤ 目有時卻兇猛霸道 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.115.128.207