Day 14

For the homework,we had to create a program that finds the peaks and valleys from a data file called elevation.  I got everything working, except the count of the peaks. My count was all over the place. Here's a copy  of my code.

/* */
/* This program determines the locations of peaks in an */
/* grid of elevation data. */
#include <stdio.h>
#define N 25
#define FILENAME "grid1.txt"
int main(void)
{
/* Declare variables. */
int nrows, ncols, i, j;
double elevation[N][N];
int total=0;
int distance=0;
FILE *grid;
/* Read information from a data file. */
grid = fopen(FILENAME,"r");
if (grid == NULL)
printf("Error opening input file\n");
else
{
fscanf(grid,"%d %d",&nrows,&ncols);
for (i=0; i<=nrows-1; i++)
for (j=0; j<=ncols-1; j++)
fscanf(grid,"%lf",&elevation[i][j]);

/* Determine and print peak locations. */
printf("Top left point defined as row 0, column 0 \n");
int count=0;
for (i=1; i<=nrows-2; i++)
for (j=1; j<=ncols-2; j++)
{

if ((elevation[i-1][j]<elevation[i][j]) &&
(elevation[i+1][j]<elevation[i][j]) &&
(elevation[i][j-1]<elevation[i][j]) &&
(elevation[i][j+1]<elevation[i][j])&&
(elevation[i-1][j-1]<elevation[i][j]) &&
(elevation[i+1][j+1]<elevation[i][j]) &&
(elevation[i-1][j-1]<elevation[i][j]) &&
(elevation[i+1][j+1]<elevation[i][j]))



printf("Peak at row: %d column: %d \n",i,j);





if ((elevation[i-1][j]>elevation[i][j]) &&
(elevation[i+1][j]>elevation[i][j]) &&
(elevation[i][j-1]>elevation[i][j]) &&
(elevation[i][j+1]>elevation[i][j])&&
(elevation[i-1][j-1]>elevation[i][j]) &&
(elevation[i+1][j+1]>elevation[i][j]) &&
(elevation[i-1][j-1]>elevation[i][j]) &&
(elevation[i+1][j+1]>elevation[i][j]))

printf("Valley at row: %d column: %d \n",i,j);
distance=(i*i+j*j)*.5*100;
printf("Distance from [0][0] is %i ft \n",distance);

//count++;
//printf("Number of Peaks is %i \n",count);
}
fclose(grid); /* Close file. */
}
return 0; /* Exit program. */

}

Here's a screencap of my output














For the lab we had to connect a speaker to a temperature sensor that makes a sound when the temperature changes. Here's a screencap of the code.














And here's a link to a video of the arduino in action
And a here's a pic

Comments

Post a Comment

Popular posts from this blog

Day 5

Image
For the lab i had to write a program that causes an LED to change color depending on the temperature Here's the code //Potentiometer Reading Program const int POT=0; //Pot on analog pin 0 int val = 0; //variable to hold the analog reading from the POT const int BLED=9; //Blue LED on Pin 9 const int GLED=10; //Green LED on Pin 10 const int RLED=11; //Red LED on Pin 11 int ledMode = 0; //Cycle between LED states void setup() {  Serial.begin(9600); //Start Serial Communication  pinMode (BLED, OUTPUT); //Set Blue LED as Output  pinMode (GLED, OUTPUT); //Set Green LED as Output  pinMode (RLED, OUTPUT); //Set Red LED as Output } void loop() {  val = analogRead(POT); //Read one value from the POT  if (val <= 139)  { digitalWrite(BLED,HIGH); digitalWrite(GLED,LOW); digitalWrite(RLED,LOW);  } if (val<=147 && val>=139) {   digitalWrite(GLED,HIGH);   digitalWrite(BLED,LOW);   digitalWrite(RLED,...
Read more

Day 22 Nov 14

Image
For homework we had to modify the hand recognition code to read the knowns from a data file, create an array of unknowns from user input, point to the known value with the smallest difference, and print it all out. Here's the code #include <iostream> #include <cmath> #include <fstream> //#define FILENAME "known.txt" using namespace std; int main(void) { double known[5]; ifstream myfile ("known.txt");   if (myfile.is_open())   {     int k;     for(k=0;k<=4;k++) { myfile>>known[k]; }     myfile.close();   } //Declare and initialize variables. //double unknown[5]={5.4,7.2,7.9,7.4,5.1}; double unknown[5]; //double known[5]={6.2,7.0,8.0,7.4,5.8}; cout<<"enter 5 unknown values"<<endl; int k; for(k=0;k<=4;k++) { cin>>unknown[k]; } double distance(double hand_1[5],double hand_2[5]); double comp(double hand_1[5],double hand_2[5]); // Compute and print ...
Read more

Day 21 Nov 9

Image
For the homework I had to create a quick sort function, and then use a quicksort function in a linked list. Here's a screenshot of both parts of the homework: Just the quick list part #include <stdio.h> #include <stdlib.h> //void quicksort(int[], int, int); //int partition( int[], int, int); int partition(int a[], int p, int r) { int i,j, pivot, temp; pivot = a[p]; i = p; j = r; while(1) { while(a[i] < pivot && a[i] != pivot) i++; while(a[j] > pivot && a[j] != pivot) j--; if (i <j) { temp = a[i]; a[i] = a[j]; a[j] = temp; } else { return j; } } } void quicksort(int a[], int p, int r) { if (p < r) { int q; q = partition(a, p ,r); quicksort(a,p,q); quicksort(a, q+1, r); } } int main(void) { struct sort; int a[]= {25, 52, 37, 63, 14, 17, 8, 6}; int i; quicksort( a, 0, 7); printf("Sorted array is: "); for(i=0; i<8; ++i) printf(" %d", a[i]); return 0; } ...
Read more