Question

write a program to read x and print sin x if x>0,square root x f x<0 and absolute x if x/2 is integer.
write c++ program to read two integer numbers,and read the operation to perform on these numbers
write c++ program to read 5 numbers and determine if the numbers sorted ascending or not

Answer 1

//write a program to read x and print sin x if x > 0,
//square root x if x < 0
//and absolute x if x/2 is integer.

#include <iostream>
using namespace std;
#include <conio.h>
#include <math.h>

int main()
{
double x;
cout << "Input the number: x = ";
cin >> x;
if(x > 0) cout << "Sin(x) = " << sin(x) << endl;
if(x < 0) cout <<"Sqrt(x) = "<< sqrt(-x) << "i" << endl;
if((x - (int)x == 0 )&&((int)x % 2 == 0)) cout<< "fabs(x) = " << fabs(x); &
getch();
return 0;
}



//write c++ program to read two integer numbers,and read the operation to
//perform on these numbers


#include <iostream>
using namespace std;
#include <conio.h>
#include <math.h>

int main()
{

double x, y;
char operation;
cout << "Input two numbers: " << endl;
cout << "x = ";
cin >> x;
cout << "y = ";
cin >> y;
cout << "Select operation (+, -, /, *):& ";
cin >> operation;&
if(operation == '+') cout << "x + y = " << x + y;
if(operation == '-') cout << "x - y = " << x - y;
if(operation == '*') cout << "x * y = " << x * y;
if(operation == '/') cout << "x / y = " << x / y;
getch();
return 0;
}





//write c++ program to read 5 numbers and determine if the numbers sorted
//ascending or not


#include <iostream>
using namespace std;
#include <conio.h>
#include <math.h>

int main()
{

double x1, x2, x3, x4, x5;
cout << "Input five numbers: " << endl;
cin >> x1;
cin >> x2;
cin >> x3;
cin >> x4;
cin >> x5;
if((x1 < x2) && (x2 < x3) && (x3 < x4) && (x4 < x5)) cout << endl <<"The numbers are sorted! ";
else cout << endl << "The numbers are not sorted! ";
getch();
return 0;
}