Questions for FRQ in APCSA, turned in 12/13/2018. Alex Carter

FRQ-121318.java

/*
Alex Carter @ GTHS
12/13/2018
[email protected]
*/

// Question 1
public int[] replaceHighAndLow(int[] arr){
	for(int i=0;i<arr.length;i++){

		if(arr[i] > 750){
			arr[i] = 1000;
		}else{
			arr[i] = 0;
		}

	}
}

//Question 2
public boolean isIncreasing(ArrayList<Integer> arr){
	int last = Integer.MIN_VAL; // Set this to lowest value possible

	for(int val : arr){

		if(val < last){
			return false; // if it gets smaller, return early false
		}

		last = val; // Set last value
	}

	return true; // else return true
}

// Question 3
public int findCount(String[][] arr, String target){
	int count = 0;
	for(String song : arr){ // Loop through first array of songs
		for(String word : song){
			if(word == target){
				count++;
			}
		}
	}

	return count;
}

//Question 4
public int[] overpriced(double[] rsiValues){
	int[] results = new int[rsiValues];
	for(int i=0;i<rsiValues.length;i++){
		if(rsiValues[i] > 70){
			results[i] = 1;
		}else{
			results[i] = 0;
		}
	}

	return results;
}

// Question 5
public static int[] onlyEvens(int arraySize, int range){
	int[] result = new int[arraySize];

	for(int i=0;i<arraySize;i++){
		boolean foundNum = false; // Did i find a even number
		int number = -1;
		while(!foundNum){ // Make new numbers untul we make a even one.
			number = Random.nextInt(range);
			foundNum = number % 2 == 0; // Returns true if the number is even
		}

		result[i] = number;
	}

	return result;
}

// Question 6
public boolean rateIsIncreasing(ArrayList<Double> stockPrices){
	
	for(int i=0;i<stockPrices.length;i++){
		double val = stockPrices[i];
		if(i != 0){ // Not first element
			double last = stockPrices[i-1]; // Get previous element
			if(val < last){
				return false; // if the rate decreases, return false early.
			}
		}
	}

	return true;
}