Which of these is one of the primary concerns for protecting your family when online?
2 answers:
You might be interested in
Answer:
C code for half()
#include<stdio.h>
void half(float *pv);
int main()
{
float value=5.0; //value is initialized
printf ("Value before half: %4.1f\n", value); // Prints 5.0
half(&value); // the function call takes the address of the variable.
printf("Value after half: %4.1f\n", value); // Prints 2.5
}
void half(float *pv) //In function definition pointer pv will hold the address of variable passed.
{
*pv=*pv/2; //pointer value is accessed through * operator.
}
- This method is called call-by-reference method.
- Here when we call a function, we pass the address of the variable instead of passing the value of the variable.
- The address of “value” is passed from the “half” function within main(), then in called “half” function we store the address in float pointer ‘pv.’ Now inside the half(), we can manipulate the value pointed by pointer ‘pv’. That will reflect in the main().
- Inside half() we write *pv=*pv/2, which means the value of variable pointed by ‘pv’ will be the half of its value, so after returning from half function value of variable “value” inside main will be 2.5.
Output:
Output is given as image.
The program is an illustration of arrays.
Arrays are used to hold multiple values in one variable.
The program in C++ where comments are used to explain each line is as follows:
#include <iostream>
using namespace std;
int main(){
//This declares an array of three elements for the three ratings
int ratings[3];
//This initializes the sum of the ratings to 0
int total = 0;
//The following iteration gets input for the three ratings
for(int i = 0; i<3;i++){
cin>>ratings[i];
//This calculates the sum of all inputs
total+=ratings[i];
}
//This declares and initializes the lowest and the highest ratings
int lowest = ratings[0], highest = ratings[0];
//This iterates through the array
for(int i = 1; i<3;i++){
//The following if condition determines the lowest rating
if (lowest > ratings[i]){ lowest = ratings[i]; }
//The following if condition determines the highest rating
if (highest < ratings[i]){ highest = ratings[i]; }
}
//This prints the output header
cout<<"The ratings are: ";
//The following iteration prints the three ratings
for(int i = 0; i<3;i++){
cout<<ratings[i]<<" "; }
//The prints the highest ratings
cout<<endl<<"Highest: "<<highest<<endl;
//The prints the lowest rating
cout<<"Lowest: "<<lowest<<endl;
//The prints the average rating
cout<<"Average: "<<total/3<<endl;
return 0;
}
At the end of the program, the ratings entered, the highest rating, the lowest rating, and the average of the ratings are printed.
See attachment for sample run
Read more about similar programs at:
