Create heyfact.cpp

call-by-value/callllllbyvaluuue.c

@@ -0,0 +1,20 @@
+#include<stdio.h>
+
+int main() {
+   int num1, num2, res;
+
+   printf("\nEnter the two numbers : ");
+   scanf("%d %d", &num1, &num2);
+
+   //Call Function Sum With Two Parameters
+   res = sum(num1, num2);
+
+   printf("nAddition of two number is : ");
+   return (0);
+}
+
+int sum(int num1, int num2) {
+   int num3;
+   num3 = num1 + num2;
+   return (num3);
+}

factorial/heyfact.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int factorial(int n);
+int main()
+{
+    int n;
+    cout << "Enter a positive integer: ";
+    cin >> n;
+    cout << "Factorial of " << n << " = " << factorial(n);
+    return 0;
+}
+int factorial(int n)
+{
+    if(n > 1)
+        return n * factorial(n - 1);
+    else
+        return 1;
+}

fibonacci/fiboniiiii.cpp

@@ -0,0 +1,27 @@
+#include<iostream>
+using namespace std;
+int fibonacci(int num)
+{
+        if((num==1)||(num==0))
+        {
+                return(num);
+        }
+        else
+        {
+                return(fibonacci(num-1)+fibonacci(num-2));
+        }
+}
+int main()
+{
+        int num,i=0;
+        cout<<"\n How many numbers you want for Fibonacci Series : ";
+        cin>>num;
+        cout<<"\n Fibonacci Series : ";
+
+        while(i<num)
+        {
+                cout<<" "<<fibonacci(i);
+                i++;
+        }
+    return 0;
+}