Homework SourseExplain the following function what does it do bool confcha
Solution
A) Given Function is
#include <iostream>
using namespace std;
bool conf(char item)
{
int val=(int)item;
if((val>=65) && (val <=90))
return true;
else if((val>=97) && (val<=122))
return true;
else return false;
}
int main()
{
int val ;
cin >> val;
cout<< conf(val) << endl;
return 0;
}
Output: 65
1
Explanation: The above function returns True i.e 1, if the entered value is with in the given Range of Ascii values of alphabets i.e (A to Z = 65 to 90) and ( a to z = 97 to 122 ) Otherwise it Returns False i.e 0
B) Given Function is
#include <iostream>
using namespace std;
int place(char item)
{
char temp=toupper(item);
int index=(int)temp-65;
return index;
}
int main()
{
char item ;
cin >> item;
cout<< place(item) << endl;
return 0;
}
Output: Z
25
Explanation : the above function Finds the Ascii value of Entered character by the user and Subtracts 65 from that Ascii character value. Here the Ascii value of Z is 90 so the index is
index = 90- 65 = 25
C) Program:
#include<iostream>
int Fibonacci(int x) //Here the value of num is assigned to x
{
if(x==0) return 0;
if(x==1) return 1;
return Fibonacci(x-1)+Fibonacci(x-2);
// Here We returns the value of Fibonacci after performing Fibonacci(x-1)+Fibonacci(x-2)
}
int main()
{
int num;
cin >> num;
cout<< Fibonacci(num) << endl;
return 0;
}
Output: After Trace through the recursive calls the result of calling Fibonacci(5) is 5
Fibonacci(5)
Fibonacci(x-1)+Fibonacci(x-2)
Fibonacci(5-1)+Fibonacci(5-2)
Fibonacci(4) + Fibonacci(3)
3 + 2 = 5
