-----Original Message----- From: linux-c-programming-owner@xxxxxxxxxxxxxxx [mailto:linux-c-programming- owner@xxxxxxxxxxxxxxx] On Behalf Of Plato Sent: Monday, September 24, 2007 1:10 PM To: linux-c-programming Subject: Why does math.h not declare function round? Hi! I made such a program foo.c: #include <math.h> int main() { double bar=1.2; printf("%f\n", round(bar)); } Then compile and run: [root@so41 tmp]# gcc foo.c -ofoo -lm [root@so41 tmp]# ./foo 0.000000 The result was obviously wrong. Then I add statement: #include <math.h> double round(double x); int main() { double bar=1.2; printf("%f\n", round(bar)); } Then compile and run: [root@so41 tmp]# gcc foo.c -ofoo -lm [root@so41 tmp]# ./foo 1.000000 Now it's right. I wonder why function round not declared in math.h. Anyone have idea? Thx. Plato 2007-09-24 - To unsubscribe from this list: send the line "unsubscribe linux-c- programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
