Question

A program t outputs three triangles of asterisks in C with the help of function and then translate into assembly language in Pep/9.

Available answer on chegg is not giving output on Pep/9.

Answer 1

; program inputs m then prints a triangle of stars with

; m rows of stars. The first row has m stars, the second

; has m-1 stars, the third has m-2 stars and so on.

;

stro prompt,d

deci numrows,d ; number of rows to print

top:   ldwa numrows,d

stwa numonrow,d ; inner loop limit is same as rows left

top2: ldba '*',i

stba charOut,d

ldwa numonrow,d

suba 1,i

stwa numonrow,d ; number of stars left to print on line

brne top2 ; branch if more to print on this line

ldba '\n',i

stba charOut,d ; no more so output newline character

ldwa numrows,d

suba 1,i

stwa numrows,d ; number of rows to print is decreased

brne top ; branch if more rows to print

stop

numonrow: .block 2 ; inner loop counter

numrows: .block 2 ; number of rows still to print

prompt: .ascii “Enter number of rows\x00”

.end