Informatika3-2024/Megoldasok4

Megoldások

Csak azoknak a feladatoknak lesznek itt a megoldásai amiket megbeszéltünk gyakorlaton. A többi feladat tökéletes ZH-ra gyakorlásnak!

Súlypont (3. gyakról)

#include<iostream>
using namespace std;
 
float atlag(float t[], int n) {
  float s = 0.0;
  for(int i = 0; i < n; i++) {
    s += t[i];
  }
  return s / n;
}
 
int main(void) {
  float x[10];
  float y[10];
  float z[10];
  cin >> x[0];
  cin >> y[0];
  cin >> z[0];
  int i = 0;
  while(x[i] != 0 || y[i] != 0 || z[i] != 0) {
    i++;
    cin >> x[i];
    cin >> y[i];
    cin >> z[i];
  }
  cout << "(" << atlag(x, i) << ", " << atlag(y, i) << ", " << atlag(z, i) << ")" << endl;
 
  return 0;
}

Masodik lepes:

#include<iostream>
using namespace std;
 
float atlag(float t[], int n) {
  float s = 0.0;
  for(int i = 0; i < n; i++) {
    s += t[i];
  }
  return s / n;
}
 
int main(void) {
  float *x;
  float *y;
  float *z;
  int n;
  cin >> n;
  x = new float[n];
  y = new float[n];
  z = new float[n];
  for(int i = 0; i < n; i++) {
    cin >> x[i];
    cin >> y[i];
    cin >> z[i];
  }
  cout << "(" << atlag(x, n) << ", " << atlag(y, n) << ", " << atlag(z, n) << ")" << endl;
 
  delete[] x;
  delete[] y;
  delete[] z;
 
  return 0;
}

String szelet

#include<iostream>
using namespace std;
 
char* szelet(char s[], int bal, int jobb) {
  int size = jobb - bal + 2;
  char* t = new char[size];
  for(int i = bal; i <= jobb; i++) {
    t[i - bal] = s[i];
  }
  t[size - 1] = '\0';
  return t;
}
 
int main(void) {
  char str[] = "denever";
  char *to_delete = szelet(str, 2, 5);
  cout << to_delete << endl;
  delete[] to_delete;
  return 0;
}