The SQL is used to change a table's structure by:
The use of the SQL ALTER TABLE command.
<h3>How is it done?</h3>
The SQL ALTER TABLE command is known to be that which is often used to alter the structure of an existing table.
It is known to help one to be able to add or delete columns, make or destroy indexes, alter the kinds of existing columns, rename columns or the table itself.
Note that It can also be used to alter the comment for any kind of table and type of the table therein.
Learn more about SQL from
brainly.com/question/25694408
#SPJ1
Answer:
#include <iostream>
#include<iomanip>
using namespace std;
double DrivingCost(double drivenMiles, double milesPerGallon, double dollarsPerGallon)
{
double dollarCost = 0;
dollarCost = (dollarsPerGallon * drivenMiles) / milesPerGallon;
return dollarCost;
}
int main()
{
double miles = 0;
double dollars = 0;
cout << "Enter miles per Gallon : ";
cin >> miles;
cout << "Enter dollars per Gallon: ";
cin >> dollars;
cout << fixed << setprecision(2);
cout << endl;
cout << "Gas cost for 10 miles : " << DrivingCost(10, miles, dollars) << endl;
cout << "Gas cost for 50 miles : " <<DrivingCost(50, miles, dollars) << endl;
cout << "Gas cost for 400 miles: "<<DrivingCost(400, miles, dollars) << endl;
return 0;
}
Explanation:
- Create a method definition of DrivingCost that accepts three input double data type parameters drivenMiles, milesPerGallon, and dollarsPerGallon and returns the dollar cost to drive those miles
.
- Calculate total dollar cost and store in the variable, dollarCost
.
- Prompt and read the miles and dollars per gallon as input from the user
.
- Call the DrivingCost function three times for the output to the gas cost for 10 miles, 50 miles, and 400 miles.
Answer:
You can perform the following two steps
Explanation:
- Have the user press the appropriate function key combination to enable the wireless radio and then attempt to connect to the wireless network (since by mistake he could have disabled it).
- Ask the user to turn on the laptop’s airplane mode and attempt to reconnect to the wireless network (this mode basically what it does is disable adapters and activate it will connect the Wi-Fi network).
Answer:
void swapints(int *j,int *k)//Function definition.
{
*j=*j+*k-(*k=*j); //value swapping.
}
swapints(&j,&k);//call the function.
Explanation:
- The above function definition takes the address of j and k variables which is stored on the pointer variable j and k.
- Then the pointer variable uses the j and k value for the above expression, and the user does not need to return the value of j and k.
- But when the user prints the value of the j and k variable, then he gets the swapping value of the j and k variable.
- The user needs to know that the "int j" is a normal variable, but "int *j" is a pointer variable that is used to take the address of j variable.
