Lab1.cpp

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//

#include "stdafx.h"
#include <stdio.h>
#include <iostream>
#include<cmath>
using namespace std;
void l1_1();
void l1_2();
void l1_3();
void l1_4();
void l1_5();
int _tmain(int argc, _TCHAR* argv[])
{
	// l1_1();
	// l1_2();
	//l1_3();
	l1_4();
	system("pause");
	return 0;
}

void l1_1() {
	int a = 0;
	int b = 0;
	fscanf(stdin,"%d %d",&a, &b);

	a = a + b;
	b = a - b;
	a = a - b;


	fprintf(stdout, "%d %d", a, b);
}

void l1_2() {
	int i1,i2,i3,i4,i5,i6,count=0;
	 for(i1=0;i1<10;i1++)
	  for(i2=0;i2<10;i2++)
	   for(i3=0;i3<10;i3++)
		for(i4=0;i4<10;i4++)
		 for(i5=0;i5<10;i5++)
		  for(i6=0;i6<10;i6++)
		   if(i1+i2+i3==i4+i5+i6) count++;
		   
	 fprintf(stdout, "%d", count);

}

void l1_3() {
	int n = 8;
	int k = 3;
	int compsWithInfo = 1;
	int compsCanCopy = 1;
	int hours = 0;
	while (compsWithInfo < n) {

		compsWithInfo += compsCanCopy;
		compsCanCopy = compsWithInfo;
		if (compsCanCopy > k) {
			compsCanCopy = k;
		}
		hours++;
		printf("%d %d \n", compsCanCopy, compsWithInfo);

	}
	printf("Need %d hours", hours);
}

void l1_4() {
	int num = 14;
	int A = 0;
	int P = 0;
	for (int i = 0; i < num; i++) {
		//printf("i = %d\n", i);
		for (int j = i; j < num; j++) {
			int sum = 0;
			//printf("Sum = %d, j = %d\n", sum, j);
			for (int k = 0; k < j; k++) {
				//printf("k = %d sum = %d \n", k, sum);
				sum += i + k;
			}
			//printf("sum %d\n", sum);
			if (sum == num && j > P) {
				A = i;
				P = j;
			}
		}
	}
	printf("A = %d P = %d \n", A, P);
}

#include<iostream>
#include<cmath>
using namespace std;

const double pi=3.1415926;
double x[4],y[4];
double dist(double x,double y)
{
return sqrt(x*x+y*y);
}
void l1_5()
{
    int n,i; double r,s;
    //cin>>n>>r;
    n = 4;
    r = 1;
    x[0] = 0; x[1] = 2; x[2] = 2; x[3] = 0;
    y[0] = 0; y[1] = 0; y[2] = 2; y[3] = 2;
    //for (i=1; i<=n; i++) cin>>x[i]>>y[i];
    s=0; x[n+1]=x[1]; y[n+1]=y[1];
    for (i=1; i<=n; i++) {
        s+=dist(x[i]-x[i+1],y[i]-y[i+1]);
    }
    printf("%.2lf\n",s+2*pi*r);
}