Lab 4 - Prime

void setup() {
  size(250, 150);
  background(50);
  int minNumber = 0;
  int maxNumber = 20;
  int sum = 0;

  int space = 30;
  textAlign(CENTER);
  text("Sum of Prime Number", width/2, height/2-space);
  text(minNumber+" - "+maxNumber, width/2, height/2);
  while (minNumber <= maxNumber) {
    if (prime(minNumber)) {
      sum += minNumber;
    }
    minNumber++;
  }
  text("Sum = "+sum, width/2, height/2+space);
}
boolean prime(int value) {
  int num = 2;
  while (num <= value) {
    if (value%num == 0) {
      if (value == num) {
        return true;
      } else {
        return false;
      }
    }
    num++;
  }
  return false;
}

Lab 4 - Loan Payment

void setup() {
  size(450, 300);
  background(0);
  float loanAmount = 10000;
  float interestPercent = 12;
  int loanTerm = 12;
  loan(loanAmount, interestPercent, loanTerm);
}

void loan(float loanAmount, float interestPercent, int loanTerm) {
  int space = 15;
  text("Loan Amount = $"+nf(loanAmount, 1, 2), 10, space);
  text("Loan Term = "+loanTerm+" months", 10, space*3);
  text("Interest Rate = "+interestPercent+"%", 10, space*5);
  head(30, space*7);

  float interestRate = interestPercent/100;
  float effectiveInterest = interestRate/12;
  float monthlyPayment = loanAmount*(effectiveInterest/(1-pow(1+effectiveInterest, -loanTerm)));

  float interest = 0;
  float totalInterest = 0;
  float principal = 0;
  float balance = loanAmount;
  int term = 1;
  while (term <= loanTerm) {
    interest = balance * effectiveInterest;
    principal = monthlyPayment-interest;
    totalInterest += interest;
    balance -= principal;
    if (balance <= 0) {
      balance = 0;
    }
    showInfo(term, balance, principal, interest, totalInterest, 30, space*(7+term));
    term++;
  }
}

void showInfo(int term, float balance, float principal, float interest, float totalInterest, int x, int y) {
  int space = 80;
  fill(#FFFF00);
  text(term, x, y);
  text("$"+nf(principal, 1, 2), x+space, y);
  text("$"+nf(interest, 1, 2), x+space*2, y);
  text("$"+nf(balance, 1, 2), x+space*3, y);  text("$"+nf(totalInterest, 1, 2), x+space*4, y);
}

void head(int x, int y) {
  int space = 80;
  fill(#FF0000);
  text("Payment No.", x, y);
  text("Principal", x+space, y);
  text("Interest", x+space*2, y);
  text("Balance", x+space*3, y);  text("Total Interest", x+space*4, y);
}

Lab 4 - Balloon

void setup() {
  size (400, 600);
}
void draw() {
  background(255);
  int x = 200;
  int y = mouseY;

  if (y < 100) {
      y = 100;
      fill(#00AA00);
  } else {
      fill(255);
    if (y>500) {
      y=500;
      fill(#0000AA);
    }
  }
 
   draw_balloon(x, y);
   draw_balloon(x+100, y);
   draw_balloon(x-100, y);
}
void draw_balloon(int x, int y) {
  int sized = 100;
  int string_length = 150;

  line(x, y, x, y + string_length);
  ellipse(x, y, sized, sized);

}

Lab 4 - MultipleTable

void setup() {
  multi(7, 12);
}
  int i=0;
void multi(int n, int row) {
  while (i<=row) {
    int result =  n * i ;
    println( n,"*",i,"=",result) ;
    i += 1 ;
  }
}

Lab 4 - (Exercise) Countdown

void setup(){
  cal_num(10);
}
void cal_num (int i){
 
    while(i>0){
      int x=i;
      while (x<=i && x!=0){
        print(x,"");
      x--;
    }
      i--;
      println();
  }
}

Lab 4 - Summary of Integers

void setup(){
  cal_sum(10);
  cal_sum(15);
}
void cal_sum (int i){
  int a=0;
  int x=1;

    while (x<=i){
      a=a+x;
      x++;
    }println("Sum 1 to",i,"=",a);
}

** ERROR **

เมื่อพิมพ์ println("Sum 1 to",i,"=",a); ใน Processing
โปรแกรมจะแสดงผลอกมาเป็น Sum 1 to (i) = (a)
แต่เมื่อนำมาลงบล็อกแล้ว ต้องเปลี่ยนเครื่องหมายจาก
" , " เป็น " + " แทน
เพราะในบล็อกจะแสดงผลแค่ Sum 1 to