Exception Handling in C programming language

Consider the following program:

#include

void main( )

{

float i ;

i = pow ( -2, 3 ) ;

printf ( "%f", i ) ;

}

int matherr ( struct exception *a )

{

if ( a -> type == DOMAIN )

{

if ( !strcmp ( a -> name, "pow" ) )

{

a -> retval = pow ( - ( a -> arg1 ), a -> arg2 ) ;

return 1 ;

}

}

return 0 ;

}

If we pass a negative value in pow( ) function a run time error occurs. If we wish to get the proper output even after passing a negative value in the pow( ) function we must handle the run time error. For this, we can define a function matherr( ) which is declared in the 'math.h' file. In this function we can detect the run-time error and write our code to correct the error. The elements of the exception structure receives the function name and arguments of the function causing the exception.