二十五岁时我们都一样愚蠢、多愁善感，喜欢故弄玄虚，可如果不那样的话，五十岁时也就不会如此明智。
标题：C库宏 ERANGE
C库宏 ERANGE
#include <stdio.h> #include <errno.h> #include <math.h> int main () { double x; double value; x = 2.000000; value = log(x); if( errno == ERANGE ) { printf("Log(%f) is out of range\n", x); } else { printf("Log(%f) = %f\n", x, value); } x = 1.000000; value = log(x); if( errno == ERANGE ) { printf("Log(%f) is out of range\n", x); } else { printf("Log(%f) = %f\n", x, value); } x = 0.000000; value = log(x); if( errno == ERANGE ) { printf("Log(%f) is out of range\n", x); } else { printf("Log(%f) = %f\n", x, value); } return 0; }
