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