gan saya mau nanya tuas pascal, tolong koreksinya ini source code buatan saya, Program billing; Uses crt; Var j1,m1,d1,j2,m2,d2,d3: integer; j3,j4,jtotal,jmlmenit,sisajam,sisamenit,sisadetik,harga: longint; begin clrscr; write('jam login: '); read (j1); write('menit login: '); read (m1); write