chapter2-32.cpp

C++STL程序员开发指南

//文件名：CHAPTER2-32.cpp
#include <errno.h>
#include <math.h>
#include <stdio.h> 
int main(void)
{double x, y, result;
/* ... somehow set 'x' and 'y' ... */
errno = 0;
result = pow(x, y);
if (errno == EDOM) printf("domain error on x/y pair\n");
else if (errno == ERANGE) printf("range error on result\n");
else printf("x to the y = %d\n", (int) result);
return 0;
}