Write program to read three numbers and display each output

Write program to read three numbers and display each output in a separate line. Use long double type. Use setw (15) to format the output. Explain the effect of setw (15) on output. Write a C++ program to read three numbers and display them. Use double type. Use set precision (3). Explain the effect of setprecision (3) on output. Write a program to read three numbers.and display them. Use double type. Use setw (15) and setprecision (3). Explain the effect of both setw(15) and setprecision (3) on output. Write a program to read three numbers and display them. Use double type. Use setprecision (16) and showpoint. Explain the effect of both setw(15) and showpoint on output. Write a program to read three numbers as type double and display them. Use setw (15) and left manipulator objects. Explain the effect of both setw(16) and left on output. Write a C++ program to read three numbers and display them. Use double type. Use setw(16) and left manipulator object. Explain the effec

Solution

6. Setw is used to set field width for characters (i.e escape that many character with space).

#include <iostream>   
#include <iomanip>
using namespace std;
int main () {
long double a,b,c;
cin>>a>>b>>c;
cout<< a<<endl;
cout << setw(10);
cout << b << endl;
cout << setw(50);
cout << c << endl;

return 0;
}

In second line of output it can be seen that,number starts after 15 character width.

2. It is used to set the decimal precision to format float values on output operations.

// setprecision example
#include <iostream> // std::cout, std::fixed
#include <iomanip> // std::setprecision
using namespace std;
int main () {
double a,b,c;
cin>>a>>b>>c;
  
cout << a << \'\ \';
cout << setprecision(3) << b << \'\ \';
cout << setprecision(5) << c << \'\ \';
return 0;
}

In output , 2nd and 3rd line you can see there are change in precision after decimal point wrt to the argument n function.

12.

// setprecision example
#include <iostream> // std::cout, std::fixed
#include <iomanip> // std::setprecision
using namespace std;
int main () {
float hours,rate;
cin>>hours>>rate;
  
cout << hours<< setw(10) << rate << \'\ \';
return 0;
}

hours & rate is seprted by 10 character widths.