5.2 Using the random Fragment

A program using the random fragment will have the following structure:

INCLUDE '~beta/basiclib/random --- program: descriptor --- (# ... i: @integer; do ... (123, 456) -> setsd; ... (1,100) -> inguin -> i; ... #)

5.2.1 Illustrating Integer Random Generator

Program 5: tstign.bet

ORIGIN '~beta/basiclib/random'; --- program: descriptor --- (# testIgn: (# iarray: [mxint]@integer; itmp: @integer; lo, hi, i, up: @integer do (for i:nrep repeat (1,mxint)->ignuin->itmp; itmp->screen.putint(# do 7->width #); (if (i mod 10) = 0 then newline if); iarray[itmp]+1->iarray[itmp]; for); newline; ' Counts of Integers Generated:'->putline; (* Print 10 to a line using 7 characters for each field. *) mxint->up; 1->lo; l: (if lo<=up then (lo+9,up)->min->hi; lo->i; ll: (if i<=hi then iarray[i]->screen.putint(# do 7->width #); i+1->i; restart ll if); screen.newline; lo+10->lo; restart l; if) #); mxint,nrep: @integer; do ' Tests uniform random integer generator.'->putline; newline; ' Enter two seeds to initialize rn generator: '->puttext; (getint,getint)->setall; ' Enter maximum uniform integer: '->puttext; getint->mxint; ' Enter number of randoms to generate: '->puttext; getint->nrep; testIgn; #)