C++ Tutorial/Exceptions/throw — различия между версиями
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Текущая версия на 10:30, 25 мая 2010
Rethrowing an exception
#include <iostream>
using namespace std;
void f()
{
try {
throw "hello"; // throw a char *
}
catch(char *) { // catch a char *
cout << "Caught char * inside f\n";
throw ; // rethrow char * out of function
}
}
int main()
{
cout << "start\n";
try{
f();
}
catch(char *) {
cout << "Caught char * inside main\n";
}
cout << "end";
return 0;
}start This application has requested the Runtime to terminate it in an unusual way. Please contact the application"s support team for more information.
Throw an exception
#include <iostream>
using namespace std;
int main()
{
int answer, divisor, dividend;
try
{
divisor = 1;
dividend = 0;
if(dividend ==0)
throw 0;
answer = divisor/dividend;
cout << answer;
return 0;
}
catch (int i)
{
cout << "You cannot divide by zero";
}
}You cannot divide by zero"
Throw an exception from a function and catch it
#include <iostream>
using namespace std;
// function prototypes.
float divide_number(float , float);
int main()
{
float dividend,divisor,answer;
try
{
dividend = 0;
divisor = 0;
answer = divide_number(dividend,divisor);
}
catch(...)
{
cout << "oops, there is an error!";
}
return 1;
}
float divide_number(float num1, float num2)
{
try
{
float answer;
answer = num1/num2;
return answer;
}
catch(...)
{
throw;
}
}