1 #include

2 #include

3 #include

4 #include

5

6 using namespacestd;7

8 //四则运算

9 template classElementaryArithmetic{10 private:11 T result;12 T operand1, operand2;13 charoperators;14 public:15 //四则运算

16 voidCalculate();17 //加法运算

18 voidadd(T, T);19 //减法运算

20 voidsubtraction(T, T);21 //乘法运算

22 voidmultiplication(T, T);23 //除法运算

24 voiddivide(T, T);25 //输出运算符重载

26 template friend ostream &operator< &);27 };28

29 //四则运算

30 template void ElementaryArithmetic::Calculate(){31 inttype;32

33 loop1:34 system("cls");35 cout << endl << "*******************" <>type;44 if (type != 1 && type != 2 && type != 3 && type != 4)45 throw 1;46 }47 catch (inte){48 cout << endl << "输入错误，请重新输入选项...";49 system("pause");50 gotoloop1;51 }52

53 cout << endl << "请输入两个数字：";54 cin >> operand1 >>operand2;55 if (type == 1){56 add(operand1, operand2);57 operators = '+';58 }59 else if (type == 2){60 subtraction(operand1, operand2);61 operators = '-';62 }63 else if (type == 3){64 multiplication(operand1, operand2);65 operators = '*';66 }67 else if (type == 4){68 divide(operand1, operand2);69 operators = '/';70 }71

72 }73

74 //加法运算

75 template void ElementaryArithmetic::add(T operand1,T operand2){76 result = operand1 +operand2;77 }78

79 //减法运算

80 template void ElementaryArithmetic::subtraction(T operand1, T operand2){81 result = operand1 -operand2;82 }83

84 //乘法运算

85 template void ElementaryArithmetic::multiplication(T operand1, T operand2){86 result = operand1 *operand2;87 }88

89 //除法运算

90 template void ElementaryArithmetic::divide(T operand1, T operand2){91 try{92 //除数为0，出现异常

93 if ((operand2 - 0) < 1e-8 && (operand2 - 0) > -1e-8)94 throw 0;95 }96 catch (int){97 throw;98 }99 result = operand1 /operand2;100 }101

102 //输出运算符重载

103 template ostream& operator< &result){104 os << endl << "计算结果 ：" << result.operand1 << result.operators << result.operand2 << '=' << result.result <

108 //三角函数

109 classTrigonometric{110 private:111 doubleradian;112 stringtype;113 doubleresult;114 public:115 //三角函数计算

116 voidCalculate();117 //输出运算符重载

118 friend ostream &operator<

121 //三角函数计算

122 voidTrigonometric::Calculate(){123 intoption;124

125 loop2:126 system("cls");127 cout << "*******************" <>option;135 if (option != 1 && option != 2 && option != 3 && option != 4)136 throw 2;137 }138 catch (inte){139 cout << endl << "输入错误，请重新输入选项...";140 system("pause");141 gotoloop2;142 }143

144

145 cout << endl << "请输入弧度：";146 cin >>radian;147

148 if (option == 1){149 result =sin(radian);150 type = "sin";151 }152 else if (option == 2){153 result =cos(radian);154 type = "cos";155 }156 else if (option == 3){157 result =tan(radian);158 type = "tan";159 }160 }161

162 //输出运算符重载

163 ostream &operator<

168 intmain(){169 inttype;170

171 loop:172 while (true){173 system("cls");174 cout << "*******主菜单**********" <

183 try{184 cin >>type;185 if (type != 1 && type != 2 && type != 3)186 throw - 1;187

188 if (type == 1){189 ElementaryArithmeticcalc;190 calc.Calculate();191 cout <

210 }211 cout <