pro*C/C++支持c++开发实例

Pro*C/C++同时支持C和C++，但是当预编译包含C++代码的PC源程序时，必须合理地设置相关的预编译选项。

 

代码：xx.pc

/*功能：演示了Pro*C/C++源程序生成C++源文件说明：Pro*C/C++支持C和C++。当预编译包含C++代码的PC源程序时，必须合理地设置相关的预编译选项。预编译选项应该设置为cpp_suffix=cpp code=cpp parse=none(或partial)code = ANSI_C, KR_C, CPPparse = NONE, PARTIAL, FULLcpp_suffix = c, cpp, cc*/#include <iostream.h>#include <stdio.h>#include <string.h>#include <stdlib.h>EXEC SQL BEGIN DECLARE SECTION;// 定义宿主变量struct empdat{varchar emp_name[10];float salary;float commission;}emprec;struct empind{short emp_name_ind;short sal_ind;short comm_ind;}emprec_ind;int eno;EXEC SQL END DECLARE SECTION;class emp// 自定义类{char ename[10];float salary;float commission;public:emp();emp(empdat &dat, empind &ind);void setvalues(empdat &dat, empind &ind);friend ostream& operator<<(ostream &s, emp &e);// 定义友元函数};emp::emp(){memset(ename, 0, sizeof(ename));salary = commission = 0.0;}emp::emp(empdat &dat, empind &ind){strncpy(ename, (char*)dat.emp_name.arr, dat.emp_name.len);ename[dat.emp_name.len] = '\0';this->salary = dat.salary;this->commission = (ind.comm_ind < 0) ? 0 : dat.commission;}void emp::setvalues(empdat &dat, empind &ind){strncpy(ename, (char*)dat.emp_name.arr, dat.emp_name.len);ename[dat.emp_name.len] = '\0';this->salary = dat.salary;this->commission = (ind.comm_ind < 0) ? 0 : dat.commission;}ostream& operator <<(ostream &s, emp &e){return s<<"name: "<<e.ename<<", salary: "<<e.salary<<", comm: "<<e.commission<<endl<<endl;}#include <sqlca.h>#pragma comment(lib, "orasql10.lib")  int connect();  void sql();  void sql_error();void main()  {      EXEC SQL WHENEVER SQLERROR DO sql_error();  // 安装错误处理句柄       if(connect() == 0)      {          sql();          EXEC SQL COMMIT WORK RELEASE;           // 提交事务，断开连接       }      else          printf("连接失败\n");  }    int connect()                   // connect to oracle database   {  EXEC SQL BEGIN DECLARE SECTION;// 定义宿主变量char username[10], password[10], server[10];  EXEC SQL END DECLARE SECTION;      strcpy(username, "scott");      strcpy(password, "scott");      strcpy(server, "orcl");        EXEC SQL CONNECT :username IDENTIFIED BY :password USING :server;      if(sqlca.sqlcode == 0)          return 0;      else          return sqlca.sqlcode;  }    void sql_error()                // print error infomation   {      printf("%.*s\n", sqlca.sqlerrm.sqlerrml, sqlca.sqlerrm.sqlerrmc);  }    void sql(){  emp e;while(1){cout<<"请输入雇员号(0：退出)：";flush(cout);scanf("%d", &eno);fflush(stdin);if(eno == 0)return;EXEC SQL WHENEVER NOT FOUND goto notfound;   // 游标数据提取完毕后退出循环    EXEC SQL select ename, sal, comm into :emprec indicator :emprec_ind from emp where empno=:eno;e.setvalues(emprec, emprec_ind);cout<<e;continue;notfound:cout<<"无效雇员号"<<endl<<endl;}      printf("sqlca.sqlerrd[2] = %d\n", sqlca.sqlerrd[2]);        // sqlca.sqlerrd[2]存放着Select语句作用的行数   }

 

xx.pc文件对应的预编译选项如图：