Introduction to C++ - Applications solved


1) Make a program that exemplifies solving global domain validity (using operator is required resolution).
#include <iostream>
#include <fstream>
using namespace std;
int name=10;
void main()
{
	int name=5; //local variable
	cout<<"Local variable value "<<name<<endl; //endl is used for switching to new line //=5
	cout<<"Global variable value "<<::name<<'\n'; //=10
	
	int g;
 	cin >>g;
}
2) Make a program alias.cpp which creates two aliases and use them to display values ​​and variables specified addresses.
#include <iostream>
#include <fstream>
using namespace std;
 
void main()
{
int a=10;
int& a_alias=a;
float b=42.76;
float& b_alias=b;
cout<<"The value of a is "<<a<<", alias is "<<a_alias<<endl;
cout<<"Address of a is "<<&a<<", and of alias is "<<&a_alias;
cout<<"\nThe value of b is "<<b<<", alias is "<<b_alias; a_alias++;
cout<<"\nThe value of a is "<<a<<", alias is "<<a_alias;
 
 int g;
 cin >>g;
}
3) Make a program that creates three functions for the three types of transmission parameters received two values ​​as parameters to try and swap between them.
#include <iostream>
#include <fstream>
using namespace std;
void value(int,int);
void address(int*,int*);
void reference(int&,int&);
 
void main()
{
	int a,b;
	cout<<"Enter a: ";
	cin>>a;
	cout<<"Enter b: ";
	cin>>b;
	cout<<"a and b are: "<<a<<" "<<b<<endl;
	value(a,b);
	cout<<"a and b are: "<<a<<" "<<b<<endl;
	address(&a,&b);
	cout<<"a and b are: "<<a<<" "<<b<<endl;
	reference(a,b);
	cout<<"a and b are: "<<a<<" "<<b<<endl;
 
	int g;
	cin >>g;
}
void value(int m, int n)
{
	int t;
	t=m;
	m=n;
	n=t;
}
void address(int* m, int* n)
{
	int t;
	t=*m;
	*m=*n;
	*n=t;
}
void reference(int& m, int& n)
{
	int t;
	t=m;
	m=n;
	n=t;
}
4) Write a program that reads and displays complex numbers.
#include <iostream>
#include <fstream>
#include<math.h>
using namespace std;
typedef struct {
double x;
double y;
}complex;
void main()
{
	complex z;
	cout<<"Enter real value (a): ";
	cin>>z.x;
	cout<<"Enter imaginary value (b): ";
	cin>>z.y;
	cout<<endl;//leave a blank line
	cout<<'\t'<<"a+bi="<<z.x;
	if (z.y>=0)
		cout<<"+"<<z.y<<"*i"<<endl;
	else
		cout<<z.y<<"*i"<<endl;
 
	int g;
	cin >>g;
}
5) Exemplify the static specifier.
#include <iostream>
#include <fstream>
using namespace std;
int& atrib()
{
	static int a=8;
	a++;
	return a;
}
void main()
{
	cout<<atrib()<<endl;
	atrib()=7;
	cout<<atrib()<<endl;
	
	int g;
	cin >>g;
}
6) Make an expression of the form: 1-2 3-4 ...... +-n, where n is an integer given by the keyboard. Function will send the result by line parameters by reference.
#include <iostream>
#include <fstream>
using namespace std;
void sum(int &s,int n)
{
	s=0;
	int sign=1;
	for(int i=1;i<=n;i++)
	{
		s+=sign*i;
		sign=-sign;
	}
}
 
void main()
{
	int s,n;
	cout<<"Enter n: ";
	cin>>n;
	sum(s,n);
	cout<<"Sum is: "<<s<<'.'<<endl;
	
	int g;
	cin >>g;
}
7) Make an expression of the form: 1-2 3-4 ...... +-n, where n is an integer given by the keyboard. Function will send the result by type result by reference.
#include <iostream>
#include <fstream>
using namespace std;
 
 
int& sum(int n)
{
	static int s=0;
	int sign=1;
	for(int i=1;i<=n;i++)
	{
		s+=sign*i;
		sign=-sign;
	}
	return s;
}
 
void main()
{
	int s,n;
	cout<<"Enter n: ";
	cin>>n;
	s=sum(n);
	sum(n)=2;
	cout<<"Sum is: "<<s<<'.'<<endl;
	cout<<"Sum is: "<<sum(n)<<'.'<<endl;
 
	int g;
	cin >>g;
}
Cookies help us deliver our services. By using our services, you agree to our use of cookies.