编程中的runtime_error问题

      前几天在编程中,代码如下:

头文件:ErrorHandlingModule.h

//filename:ErrorHandlingModule.h
#ifndef ErrorHandlingModule_H
#define ErrorHandlingModule_H
#include <stdexcept>
using namespace std;
namespace SAMSErrorHandling {
void Initialize(void);
int HandleNotANumberError(void);
int HandleRuntimeError(runtime_error theRuntimeError); 
}


#endif

实现文件:ErrorHandlingModule.cpp

//filename:ErrorHandlingModule.cpp
#include <iostream>
#include <exception>
#include <stdexcept>
#include <cstdlib>
#include "ErrorHandlingModule.h"
using namespace std;
namespace SAMSErrorHandling {



void Initialize(void) {
cin.exceptions(cin.failbit);
}


int HandleNotANumberError(void) {
cerr << "Input error - not a number?" << endl;
cin.clear();


char BadInput(5);                //Eat the bad input so we can pause the program
cin >> BadInput;


return 1;                        //An error occurred
}

int HandleRuntimeError(runtime_error theRuntimeError) {
cerr << theRuntimeError.what() << endl;

return 1;
}
}

头文件:PromptModule.h

//filename:PromptModule.h
#ifndef PromptModule_H
#define PromptModule_H
namespace SAMSPrompt {
void PauseForUserAcknowledgement(void);
bool UserWantsToContinueYOrN(const char *theThingWeAreDoing);
}
#endif

实现文件:PormptModule.cpp

//filename:PormptModule.cpp
#include <iostream>
#include "PromptModule.h"


namespace SAMSPrompt {
using namespace std;


void PauseForUserAcknowledgement(void) {
//Note: You must type something before Enter
char StopCharacter;
cout << endl << "Press a key and \"Enter\": ";
cin >> StopCharacter;
}


bool UserWantsToContinueYOrN(const char *theThingWeAreDoing) {
char DoneCharacter;
bool InvalidCharacterWasEntered = false;

do {
cout <<
endl <<
theThingWeAreDoing <<
" - Press \"n\" and \"Enter\" to stop ";


cin >> DoneCharacter;

InvalidCharacterWasEntered = !((DoneCharacter == 'y') || (DoneCharacter == 'n'));

if (InvalidCharacterWasEntered) {
cout << "...Error - " << "Please enter \"y\" or \"n\"." << endl;
};
}
while (InvalidCharacterWasEntered);


return (DoneCharacter != 'n');                //true when not "n"
  }
}

主函数:main.cpp

//filename:main.cpp
#include <iostream>
//#include <exception>
#include "ErrorHandlingModule.h"
#include "PromptModule.h"
#include <cstdlib>
using namespace std;


char GetOperator(void) {
char Operator;


cout << "Operator: ";
cin >> Operator;


return Operator;
}


float GetOperand(void) {
float Operand = 1;


cout << "Operand: ";
cin >> Operand;


return Operand;
}


float Accumulate(const char theOperator, const float theOperand) {
static float myAccumulator = 0;
switch (theOperator){
case '+': myAccumulator = myAccumulator + theOperator;
 break;
case '-': myAccumulator = myAccumulator - theOperator;
 break;
case '*': myAccumulator = myAccumulator * theOperator;
 break;
case '/': myAccumulator = myAccumulator / theOperator;
 break;
default: throw runtime_error("Error - Invalid operator");
};


return myAccumulator;
}


int main(int argc, char * argv[]) 
{
SAMSErrorHandling::Initialize();


do {
try {
char Operator = GetOperator();
float Operand = GetOperand();


cout << Accumulate(Operator, Operand) << endl;
}
catch(runtime_error RuntimeError) {
SAMSErrorHandling::HandleRuntimeError(RuntimeError);
}
catch(...) {
SAMSErrorHandling::HandleNotANumberError();
};
}
while (SAMSPrompt::UserWantsToContinueYOrN("More? "));  


return 0;
}

刚开始出现了种种的问题,后来发现是少了头文件#include <stdexcept>,调试了十几天终于成功了,欢喜一下吧

posted @ 2013-11-27 07:05  叕叒双又  阅读(752)  评论(0编辑  收藏  举报