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Jun 17, 2024oceantran27
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Compute Volume of Cylinder

Nov 18, 2022AustinLeath

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/*
Algorithm:
Step 1: Get radius of the cylinder from the user and store in variable r
Step 2: Get height of the cylinder from the user and store in variable h
Step 3: Multiply radius * radius * height * pi and store in v
Step 4: Display the volume
*/
#include <iostream>
using namespace std;
int main()
{
float r; //define variable for radius
float h; //define variable for height
float v;
float pi;
pi=3.1416;
cout<<"Enter radius:";
cin>>r;
cout<<"Enter height:";
cin>>h;
v=r*r*h*pi; //compute volume
cout<<"Radius:"<<r<<"\tHeight:"<<h<<endl; //display radius and height
cout<<"\n************************\n";
cout<<"Volume:"<<v<<endl;//display volume
return 0;
}

minimum matrix values

Nov 18, 2022AustinLeath

0 likes • 4 views

#include <iostream>
using namespace std;
int main() {
const int ROW_SIZE = 2;
const int COLUMN_SIZE = 5; //establish all variables
int matrix[ROW_SIZE][COLUMN_SIZE];
int minVal;
for (int i = 0; i < ROW_SIZE; ++i) // for loop to ask user to enter data.
{
for (int h = 0; h < COLUMN_SIZE; ++h) {
cout << "Enter data for row #" << i + 1 << " and column #" << h + 1 << ": ";
cin >> matrix[i][h];
}
}
cout << "You entered: " << endl;
for (int i = 0; i < ROW_SIZE; ++i) //for statements to output the array neatly
{
for (int h = 0; h < COLUMN_SIZE; ++h) {
cout << matrix[i][h] << "\t";
}
cout << endl;
}
cout << "Minimum for each row is: {";
for (int i = 0; i < ROW_SIZE; i++) //for statements to find the minimum in each row
{
minVal = matrix[i][0];
for (int h = 0; h < COLUMN_SIZE; h++) {
if (matrix[i][h] < minVal) // if matrix[i][h] < minVal -> minVal = matrix[i][h];
{
minVal = matrix[i][h];
}
}
cout << minVal << ", ";
}
cout << "}" << endl;
cout << "Minimum for each column is: {";
for (int i = 0; i < COLUMN_SIZE; i++) //for statements to find the minimum in each column
{
minVal = matrix[0][i];
for (int h = 0; h < ROW_SIZE; h++) {
if (matrix[h][i] < minVal) //replaces minVal with array index for that column that is lowest
{
minVal = matrix[h][i];
}
}
cout << minVal << ", ";
}
cout << "}" << endl;
return 0;
}

Enumeration Basics

Nov 18, 2022AustinLeath

0 likes • 10 views

#include <iostream>
using namespace std;
/*
Description: uses switch case statements to determine whether it is hot or not outside.
Also uses toupper() function which forces user input char to be uppercase in order to work for the switch statement
*/
int main() {
char choice;
cout << "S = Summer, F = Fall, W = Winter, P = Spring" << endl;
cout << "Enter a character to represent a season: ";asdasdasdasd
cin >> choice;
enum Season {SUMMER='S', FALL='F', WINTER='W', SPRING='P'};
switch(toupper(choice)) // This switch statement compares a character entered with values stored inside of an enum
{
case SUMMER:
cout << "It's very hot outside." << endl;
break;
case FALL:
cout << "It's great weather outside." << endl;
break;
case WINTER:
cout << "It's fairly cold outside." << endl;
break;
case SPRING:
cout << "It's rather warm outside." << endl;
break;
default:
cout << "Wrong choice" << endl;
break;
}
return 0;
}

Daily: Cutting a Wall

Dec 20, 2021aedrarian

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/*
Good morning! Here's your coding interview problem for today.
This problem was asked by LinkedIn.
A wall consists of several rows of bricks of various integer lengths and uniform height. Your goal is to find a vertical line going from the top to the bottom of the wall that cuts through the fewest number of bricks. If the line goes through the edge between two bricks, this does not count as a cut.
For example, suppose the input is as follows, where values in each row represent the lengths of bricks in that row:
[[3, 5, 1, 1],
[2, 3, 3, 2],
[5, 5],
[4, 4, 2],
[1, 3, 3, 3],
[1, 1, 6, 1, 1]]
The best we can we do here is to draw a line after the eighth brick, which will only require cutting through the bricks in the third and fifth row.
Given an input consisting of brick lengths for each row such as the one above, return the fewest number of bricks that must be cut to create a vertical line.
AUTHORS NOTE:
Makes following assumptions:
- Each row is same length
- Data is in file called "data.dat" and formatted in space-separated rows
- The cuts at the beginning and end of the wall are not solutions
This requires the following file named data.dat that is a space separated file, or similar formatted file:
----START FILE----
3 5 1 1
2 3 3 2
5 5
4 4 2
1 3 3 3
1 1 6 1 1
----END FILE----
*/
#include <algorithm>
#include <iostream>
#include <fstream>
#include <map>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
int main()
{
vector<vector<int>> wall;
ifstream in;
in.open("data.dat");
if(!in.good())
{
cout << "ERROR: File failed to open properly.\n";
}
/* Get input from space separated file */
string line;
while(!in.eof())
{
getline(in, line);
int i;
vector<int> currv;
stringstream strs(line);
while(strs >> i)
currv.push_back(i);
wall.push_back(currv);
}
/* Convert each value from "length of brick" to "position at end of brick" */
for(int y = 0; y < wall.size(); y++)
{
wall.at(y).pop_back(); //Delet last val
for(int x = 1; x < wall.at(y).size(); x++) //Skip the first bc data doesn't need change
wall.at(y).at(x) += wall.at(y).at(x-1);
}
/* Check output. COMMENT OUT */
// for(auto row : wall)
// {
// for(int pos : row)
// cout << pos << " ";
// cout << endl;
// }
/* Determine which ending position is most common, and cut there */
//Exclude final position, which will be the size of the wall
int mode = -1;
int amt = -1;
vector<int> tried;
for(auto row : wall)
{
for(int pos : row) //For each pos in the wall
{
//Guard. If pos is contained in the list, skip pos
if(find(tried.begin(), tried.end(), pos) != tried.end())
continue;
tried.push_back(pos);
/* Cycle through each row to see if it contains the pos */
int curramt = 0;
for(auto currrow : wall)
{
if( find( currrow.begin(), currrow.end(), pos ) != currrow.end() )
curramt++;
}
//cout << pos << " " << curramt << endl;
if(curramt > amt)
{
amt = curramt;
mode = pos;
}
}
}
cout << "Please cut at position " << mode << endl;
cout << "This will cut through " << (wall.size() - amt) << " bricks." << endl;
return 0;
}

Big O(n^2) Ascending Sort

Nov 18, 2022AustinLeath

1 like • 7 views

#include <iostream>
using namespace std;
int main() {
int arr[5];
for(int i = 0; i < 5; i++) {
arr[i] = i;
}
for(int i = 0; i < 5; i++) {
cout << "Outputting array info at position " << i + 1 << ": " << arr[i] << endl;
}
for(int i=0;i<5;i++)
{
for(int j=i+1;j<5;j++)
{
if(arr[i]>arr[j])
{
int temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;
}
}
}
cout << endl;
for(int i = 0; i < 5; i++) {
cout << "Outputting sorted array info at position " << i + 1 << ": " << arr[i] << endl;
}
return 0;
}

wordScore.cpp

Apr 16, 2023LeifMessinger

0 likes • 0 views

#include <iostream>
#include <string> //Should already be in iostream
#include <cstdlib>
//A word score adds up the character values. a-z gets mapped to 1-26 for the values of the characters.
//wordScore [wordValue]
//Pipe in the input into stdin, or type the words yourself.
//Lowercase words only
int characterValue(const char b){
return ((b >= 'a') && (b <= 'z'))? ((b - 'a') + 1) : 0;
}
int main(int argc, char** argv){
//The first argument specifies if you are trying to look for a certain word score
int wordValue = (argc > 1)? std::atoi(argv[1]) : 0;
std::string line;
while(std::getline(std::cin, line)){
int sum = 0;
for(const char c : line){
sum += characterValue(c);
}
if(wordValue){ //If wordValue is 0 or the sum is the correct value
if(wordValue == sum){
std::cout << line << std::endl;
}
} else {
std::cout << sum << "\t" << line << std::endl;
}
}
return 0;
}