pat::b::b1054 命名空间参考

1054 求平均值 更多...

函数
int	main (istream &cin, ostream &cout)
	TEST (b1054, case1)
	TEST (b1054, case2)

详细描述

1054 求平均值

函数说明

main()

int pat::b::b1054::main	(	istream &	cin,
		ostream &	cout )

在文件 pat.cpp 第 1836 行定义.

                                                  {
                int n;
                cin >> n;
                string x;
                long double sum = 0;
                int k           = 0;
                while(n-- != 0) {
                    cin >> x;
                    bool flag = true;
                    int start = 0;
                    if(x[0] == '-') {
                        if(x.length() > 1) {
                            start = 1;
                        } else {
                            goto ERROR;
                        }
                    }
                    if(x.length() > 8) {
                        goto ERROR;
                    }
                    if(isdigit(x[start]) != 0) {
                        int pos = -1;
                        for(int i = start + 1; i < x.length(); ++i) {
                            if(x[i] == '.') {
                                if(flag) {
                                    flag = false;
                                    pos  = i;
                                } else {
                                    goto ERROR;
                                }
                            } else if(isdigit(x[i]) == 0) {
                                goto ERROR;
                            }
                        }
                        if(!flag) {
                            if(pos + 3 < x.length()) {
                                goto ERROR;
                            }
                        }
                        stringstream ss;
                        ss << x;
                        if(flag) {
                            int num;
                            ss >> num;
                            if(num >= -1000 && num <= 1000) {
                                sum += num;
                                k++;
                            } else {
                                goto ERROR;
                            }
                        } else {
                            long double num;
                            ss >> num;
                            if(num >= -1000 && num <= 1000) {
                                sum += num;
                                k++;
                            } else {
                                goto ERROR;
                            }
                        }
                    } else {
                    ERROR:
                        cout << "ERROR: " << x << " is not a legal number" << endl;
                    }
                }
                if(k == 0) {
                    cout << "The average of 0 numbers is Undefined" << endl;
                } else {
                    const long double y = sum / k;
                    cout << "The average of " << k << " number" << (k == 1 ? "" : "s") << " is " << fixed << setprecision(2) << y << endl;
                }
                return 0;
            }

被这些函数引用 TEST() , 以及 TEST().

TEST() [1/2]

pat::b::b1054::TEST	(	b1054	,
		case1	)

在文件 pat_test.cpp 第 810 行定义.

                               {
                istringstream in("7\n"
                                 "5 -3.2 aaa 9999 2.3.4 7.123 2.35");
                auto out = ostringstream();
                main(in, out);
                const auto ans = out.str();
                ASSERT_EQ("ERROR: aaa is not a legal number\n"
                          "ERROR: 9999 is not a legal number\n"
                          "ERROR: 2.3.4 is not a legal number\n"
                          "ERROR: 7.123 is not a legal number\n"
                          "The average of 3 numbers is 1.38\n",
                          out.str());
            }

引用了 main().

TEST() [2/2]

pat::b::b1054::TEST	(	b1054	,
		case2	)

在文件 pat_test.cpp 第 824 行定义.

                               {
                istringstream in("2\n"
                                 "aaa -9999");
                auto out = ostringstream();
                main(in, out);
                const auto ans = out.str();
                ASSERT_EQ("ERROR: aaa is not a legal number\n"
                          "ERROR: -9999 is not a legal number\n"
                          "The average of 0 numbers is Undefined\n",
                          out.str());
            }

引用了 main().