Answer: The difference between call by value and call by reference is that in call by value the actual parameters are passed into the function as arguments whereas in call by reference the address of the variables are sent as parameters.
Explanation:
Some examples are:
call by value
#include <stdio.h>
void swap(int, int);
int main()
{ int a = 10, b= 20;
swap(a, b);
printf("a: %d, b: %d\n", a, b);
}
void swap(int c, int d)
{
int t;
t = c; c = d; d = t;
}
OUTPUT
a: 10, b: 20
The value of a and b remain unchanged as the values are local
//call by reference
#include <stdio.h>
void swap(int*, int*);
int main()
{
int a = 10, b = 20;
swap(&a, &b); //passing the address
printf("a: %d, b: %d\n", a, b);
}
void swap(int *c, int *d)
{
int t;
t = *c; *c = *d; *d = t;
}
OUTPUT
a: 20, b: 10
due to dereferencing by the pointer the value can be changed which is call by reference
Explanation:
different computer are connected to a LAN by a cable and an interface card
Answer:
The statement would be true
.
Explanation:
let, L = is a NFL player
M = teaches in CSU
N = has tattoos
Given that:
nfl player who teaches in csu = L^ M (this is false every time)
Above statement is L ^ M -> N
this would be true because
false -> true (true
)
false -> false (true
)
Second exp:
There are no players who teach in Csu therefore if we say they all have tattoos statement would be true.
