Programming Reference/Librarys
Question & Answer
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compile in linux with: gcc atan.c -o atan -lm -Wall
#include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include <math.h> /* including math library */ int main ( void ){ double a=0.2; printf("atan from %f is %f\n", a, atan(a) * 90 / 3.17); return 0; }
output: user@host:~$ ./atan atan from 1.200000 is 24.872311