procedure identitas; forward; (* memperkenalkan proc identitas yang blm dibuat, tp akan sering dipakai di procedure2 diatasnya *)

Transkripsi

1 program geometri_with_record; { yunisusanti informatic engineering UNS} uses wincrt; type titik = record x, y : real; garis = record p, q : titik; var garisa, garisb : garis; grad, inter, x, y, jrk : real; procedure identitas; forward; (* memperkenalkan proc identitas yang blm dibuat, tp akan sering dipakai di procedure2 diatasnya *) {================================= fungsi fungsi boolean ============================================} function ISSETITIK (p, q : titik): boolean; {syarat fungsi gradien, intercept, titikpot, dan jarak} issetitik := (p.x = q.x) and (p.y = q.y); {issetitik bila xp = xq dan yp=yq / x1 = x2 & y1 = y2} function ISVERTIKAL (p, q : titik): boolean; {syarat fungsi gradien} isvertikal := (p.x = q.x) and (p.y <> q.y); {isvertikal bila x1 = x2 dan y1 tdk sm dgn y2} x2} function ISHORISONTAL (p, q : titik): boolean; {ishorisontal bila y1 = y2 dan x1 tdk sm dgn ishorisontal := (p.y = q.y) and (p.x <> q.x); {================================= fungsi boolean ==============================================} {================================= procedure manipulasi ======================================} procedure manipulasi; { of gradien } procedure gradienku; false) false) then function GRADIEN (p, q : titik): real; (* syarat dari menghitung gradien adl garis TIDAK setitik maupun vertikal *) if (isvertikal(garisa.p, garisa.q) = false) and (issetitik(garisa.p, garisa.q) = and (isvertikal(garisb.p, garisb.q) = false) and (issetitik(garisb.p, garisb.q) = grad := (q.y - p.y) / (q.x - p.x); writeln; {rumus menghitung gradien} writeln(' ',grad:5:2); else gotoxy(15, 8); writeln('ada garis yang setitik/ vertikal, gradien tidak bisa dihitung!!'); gotoxy(15,10); write ('anda harus kembali ke menu!!'); identitas; gotoxy(15, 6); writeln('" gradien kedua garis "'); gotoxy(15, 9); writeln('- gradien garis A'); {untuk gradien dr garis A}

2 gradien(garisa.p,garisa.q); {memanggil fungsi gradien} gotoxy(15,13); writeln('- gradien garis B'); {untuk gradien dr garis B} gradien(garisb.p,garisb.q); {memanggil fungsi gradien} { of gradien } { of intercept } procedure intersepku; setitik} false) then bs dhitung}!!'); function INTERCEPT (p,q: titik): real; {intercept bisa dihitung jika garis tdk if (issetitik(garisa.p, garisa.q) = false) and (issetitik(garisa.p, garisa.q) = {rumus menghitung intercept} inter := (p.y)-((p.x)*((q.y - p.y) / (q.x - p.x))); writeln; writeln(' ',inter:5:2); else {jika garis setitik, maka intercept tdk gotoxy(15, 8); writeln('ada garis yang setitik, intercept tidak bisa dihitung gotoxy(15,10); write ('anda harus kembali ke menu!!'); identitas; gotoxy(15, 6); writeln('" intercept kedua garis "'); gotoxy(15, 9); writeln('- intercept garis A'); {intercept garis A} intercept(garisa.p,garisa.q); {memanggil fungsi intercept} gotoxy(15,13); writeln('- intercept garis B'); {intercept garis B} intercept(garisb.p, garisb.q); {memanggil fungsi intercept} { of intercept } { of titikpot } procedure TITIKPOTONG; var grad1, grad2, int1, int2 : real; with garisa do {menghitung gradien dan intersep garis A} grad1 := (q.y - p.y) / (q.x - p.x); int1 := (p.y)-((p.x)*((q.y - p.y) / (q.x - p.x))); with garisb do {menghitung gradien dan intersep garis A} grad2 := (q.y - p.y) / (q.x - p.x); int2 := (p.y)-((p.x)*((q.y - p.y) / (q.x - p.x))); {dibawah ini bentuk lain fungsi ISPARALEL -> yaitu mengecek apakah kedua gradien sama} if (grad1 = grad2) then writeln(' tidak bisa dihitung titik potongnya!!') else {jika gradien tidak sama maka hitung titikpotong} x := (int2 - int1) / (grad1 - grad2); y := grad1*x + int1; writeln(' (',x:2:0,',',y:2:0,')'); { of titikpot } { of persamaan garis } procedure PERSAMAAN1; {mencetak persamaan dari garis A / garis yg pertama} if (isvertikal(garisa.p, garisa.q) = false) then {mengecek apakah tidak vertikal}

3 false dan jika {persamaan y=intercept bila isvertikal {ishorisontal true} if (ishorisontal(garisa.p, garisa.q) = true) then writeln(' y = ',inter:2:1) else {persamaan utuh / y=gradx + intercept {isvertikal dan ishorisontal false} writeln(' y = ',grad:2:1,'x + ',inter:2:1,''); else writeln(' x = ',garisa.p.x); {pers x=px jika garisnya vertikal} procedure PERSAMAAN2; {mencetak persamaan garis B / garis kedua} if (isvertikal(garisb.p, garisb.q) = false) then if (ishorisontal(garisb.p, garisb.q) = true) then writeln(' else writeln(' else writeln(' y = ',grad:2:1,'x + ',inter:2:1,''); x = ',garisb.p.x); y = ',inter:2:1) { of persamaan garis } gradienku; {memanggil/ menampilkan gradien dan intercept} intersepku; {menampilkan persamaan garis } gotoxy(10, 6); writeln('" persamaan garis A dan garis B "');writeln; persamaan1; writeln; persamaan2; {menampilkan titik potong} gotoxy(10, 6); writeln('" titik potong garis A dan garis B "');writeln; titikpotong; writeln; writeln; write(' identitas; # press -enter- to back to menu... '); {kembali ke identitas / menu} {================================= procedure manipulasi =======================================} {================================= menghitung jarak =========================================} procedure jarakqu; function JARAK (p, q : titik): real ; jrk := sqrt(sqr(q.x - p.x) + sqr(q.y - p.y));writeln; {rumus menghitung jarak} writeln(' jarak is ', jrk:5:1); gotoxy(15, 7); writeln('" ingin menghitung jarak titik dari garis mana "'); gotoxy(15, 9); writeln('a. garis A B. garis B '); gotoxy(13,18); write ('silahkan pilih!! '); readln(pil); if pil = 'a' then {jika ingin menghitung jarak titik dari garis A} {syarat menghitung jarak jika tidak setitik} if (issetitik(garisa.p, garisa.q) = false) then jarak(garisa.p, garisa.q) else gotoxy(15, 8); writeln('garis setitik, jarak tidak bisa dihitung!!'); gotoxy(15,10); write ('anda harus kembali ke menu!!'); if pil = 'b' then {jika ingin menghitung jarak titik dari garis B}

4 if issetitik(garisb.p, garisb.q) = false then jarak(garisb.p, garisb.q) else {jika garis ternyata setitik} gotoxy(15, 8); writeln('garis setitik, jarak tidak bisa dihitung!!'); gotoxy(15,10); write ('anda harus kembali ke menu!! '); identitas; {kembali ke menu utama / identitas} {==================================== menghitung jarak =======================================} {================================= procedure cetaktitik ====================================} procedure CETAKTITIK; var i : byte; gotoxy(19, 6); writeln('" hasil cetak titik "'); gotoxy(15, 8); writeln(' '); gotoxy(15, 9); writeln('-- nama garis titik ke x y --'); gotoxy(15,10); writeln(' '); with garisa do {mencetak titik garis A} writeln('garis a':25, '1':11, p.x:9:0, p.y:7:0); writeln('garis a':25, '2':11, q.x:9:0, q.y:7:0); writeln; with garisb do {mencetak titik garis B} writeln('garis b':25, '1':11, p.x:9:0, p.y:7:0); writeln('garis b':25, '2':11, q.x:9:0, q.y:7:0); writeln; gotoxy(15,21); write('please select -enter- untuk menghitung jarak 2 titik!! jarakqu; {memanggil proc untuk menghitung jarak} {================================= procedure cetaktitik ========================= ============} '); {================================= procedure inputdata =====================================} procedure INPUTDATA; procedure garissatu; {input untuk garis A} gotoxy(15,7); writeln('" inputkan 2 buah titik untuk garis A " '); writeln;writeln; writeln(' " titik ke (1) "'); with garisa do write(' nilai x = '); readln(p.x); write(' nilai y = '); readln(p.y); writeln; writeln(' " titik ke (2) "'); with garisa do write(' nilai x = '); readln(q.x); write(' nilai y = '); readln(q.y); writeln; procedure garisdua; {input untuk garis B} gotoxy(15,7); writeln('" inputkan 2 buah titik untuk garis B" '); writeln;writeln; writeln(' " titik ke (1) "'); with garisb do

5 write(' nilai x = '); readln(p.x); write(' nilai y = '); readln(p.y); writeln; writeln(' " titik ke (2) "'); with garisb do write(' nilai x = '); readln(q.x); write(' nilai y = '); readln(q.y); writeln; label 1; garissatu; garisdua; 1: gotoxy(15, 6); writeln('" ingin manipulasi titik atau garis "'); gotoxy(15, 8); writeln('a. titik'); gotoxy(15,10); writeln('b. garis'); gotoxy(15,13); write('silahkan pilih!! '); readln(pil); jarak} if pil = 'a' then cetaktitik; {jika ingin manipulasi titik/ cetak titik dan menghitung if pil = 'b' then manipulasi {jika ingin manipulasi garis/ gradien, intersept, dll} else goto 1; {================================ procedure inputdata ======================================} {================================= procedure identitas =====================================} procedure IDENTITAS; label 1; 1: gotoxy(15, 9); write('- n a m e " yuni susanti "'); gotoxy(15,11); write('- n i m " M "'); gotoxy(15,13); write('- program name " manipulasi perhitungan dasar geometri "'); gotoxy(15,15); write('- d a t e " 6 Maret 2008, at pm "'); gotoxy(25,21); write('select (a) to start, and (b) to quit '); gotoxy(25,23); write('then press enter!! '); readln(pil); if pil = 'a' then inputdata; {memanggil procedure inputdata} if pil = 'b' then gotoxy(15, 6); write('thanks 4 Use This Program Of Geometry Manipulation!!!'); gotoxy(15,10); write('... press any key to quit ^^... '); readkey; donewincrt; else goto 1; {jika pil selain a/ b maka akan kembali ke label 1} {================================= procedure identitas =======================================} {================================= MAIN program ==================================================} screensize.x := 90; {lebar screen horisontal/ x } screensize.y := 400; {lebar screen vertikal/ y } identitas;. {================================= END PROGRAM ===================================================}