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c:math.h:floor [2013/01/22 22:02] |
c:math.h:floor [2024/02/16 01:05] (current) |
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+ | {{keywords>wiki library source code example reference}} | ||
+ | ===== floor ===== | ||
+ | <code c> | ||
+ | double floor(double); | ||
+ | </code> | ||
+ | rounding down a number | ||
+ | ===== C Sourcecode Example ===== | ||
+ | compile in linux with: gcc floor.c -o floor **-lm** -Wall | ||
+ | <code c> | ||
+ | #include <stdio.h> /* including standard library */ | ||
+ | //#include <windows.h> /* uncomment this for Windows */ | ||
+ | |||
+ | #include <math.h> /* including math library */ | ||
+ | |||
+ | int main ( void ) | ||
+ | { | ||
+ | double y,x; | ||
+ | x = 4.2; | ||
+ | y = 9.9; | ||
+ | printf("floor of %f is %f\n", x, floor(x) ); | ||
+ | printf("floor of %f is %f\n ",y , floor(y) ); | ||
+ | return 0; | ||
+ | } | ||
+ | |||
+ | </code> | ||
+ | |||
+ | ==== output ==== | ||
+ | output: | ||
+ | user@host:~$ ./floor | ||
+ | floor of 4.200000 is 4.000000 | ||
+ | floor of 9.900000 is 9.000000 |