RosettaCodeData/Task/Gamma-function/AWK/gamma-function.awk

19 lines
352 B
Awk

# syntax: GAWK -f GAMMA_FUNCTION.AWK
BEGIN {
e = (1+1/100000)^100000
pi = atan2(0,-1)
print("X Stirling")
for (i=1; i<=20; i++) {
d = i / 10
printf("%4.2f %9.5f\n",d,gamma_stirling(d))
}
exit(0)
}
function gamma_stirling(x) {
return sqrt(2*pi/x) * pow(x/e,x)
}
function pow(a,b) {
return exp(b*log(a))
}