RosettaCodeData/Task/Pi/Bc/pi.bc

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#!/usr/bin/bc -l
scaleinc= 20
define zeropad ( n ) {
auto m
for ( m= scaleinc - 1; m > 0; --m ) {
if ( n < 10^m ) {
print "0"
}
}
return ( n )
}
wantscale= scaleinc - 2
scale= wantscale + 2
oldpi= 4*a(1)
scale= wantscale
oldpi= oldpi / 1
oldpi
while( 1 ) {
wantscale= wantscale + scaleinc
scale= wantscale + 2
pi= 4*a(1)
scale= 0
digits= ((pi - oldpi) * 10^wantscale) / 1
zeropad( digits )
scale= wantscale
oldpi= pi / 1
}