inserting element at even indices of an array

IpAtEvenIndex.cpp

@@ -0,0 +1,79 @@
+/*
+  Name : Vishal Rathi
+  Roll Number : 303302219121
+  Date : 17-Aug-2020
+  Purpose : Code for algorithm of inserting items in even indices of an array
+  (From left to right - Assumed)
+*/
+
+#include <iostream>
+
+void arrayTraverse(int, int, int[],int);
+void evenInsertion(int, int, int[], int, int);
+
+int main()
+{
+  int n,lb,ub,max,num;
+
+  std::cout << "Enter number of elements in array:" ;
+  std::cin >> n;
+
+  int arr[n];
+  max = n-1;
+
+  std::cout << "enter elements of array:\n" ;
+  for(int i=0;i<n;i++)
+  {
+    std::cin >> arr[i];
+  }
+
+  std::cout << "\nEnter the value of lower bound: " ;
+  std::cin >> lb;
+
+  std::cout << "\nEnter the value of upper bound: " ;
+  std::cin >> ub;
+
+  std::cout << "\nEnter the value to be added in every even indices: " ;
+  std::cin >> num;
+  //calling the evenInput Function
+  evenInsertion(lb,ub,arr,num,max);
+
+  arrayTraverse(lb,ub,arr,max);
+
+  return 0;
+}
+
+void evenInsertion(int lb,int ub,int list[],int num,int max)
+{
+  int i,j,item;
+  if(lb>ub)
+  {
+    std::cout << "\n Error" ;
+    return;
+  }
+
+  if(ub>max)
+  {
+    std::cout << "\n Overflow Condition";
+    return;
+  }
+
+  if(lb%2==0)
+    j = lb;
+  else
+    j = lb + 1;
+  while(j<=ub)
+  {
+      list[j] = list[j] + num;
+      j = j+2;
+  }
+
+}
+
+void arrayTraverse(int lb, int ub,int list[],int max)
+{
+  for(int i=lb;i<=ub;i++)
+  {
+    std::cout << list[i] << "\t" ;
+  }
+}

prog2.cpp

@@ -10,15 +10,15 @@ void travarray(int[],int,int,int);
 int main(){
 	int ip[10],lb,ub,pos,item;
 	cout<<"Enter Elements of array";
-	for(int i=0;i<=10;i++){
+	for(int i=0;i<10;i++){
 		cin>>ip[i];
 	}
 	cout<<"Enter the value of lower bound";cin>>lb;
 	cout<<"Enter the value of upper bound";cin>>ub;
 	cout<<"Enter the pos";cin>>pos;
 	cout<<"Enter the value of item";cin>>item;
 	//function call
-	arrayinsertion(lb,ub,ip,pos,item,3);
+	arrayinsertion(lb,ub,ip,pos,item,9);
 	return 0;
 }
 
@@ -37,7 +37,7 @@ void travarray(int ip[],int lb,int ub, int max){
 }
 
 void arrayinsertion(int lb,int ub,int ip[],int pos, int item,int max){
-	cout<<"Input Array";
+	cout<<"Input Array :";
 	travarray(ip,lb,ub,10);
 	if(lb>ub){
 		cout<<"error";
@@ -50,12 +50,13 @@ void arrayinsertion(int lb,int ub,int ip[],int pos, int item,int max){
 	for(int i=ub; ;){
 		ip[i]=ip[i-1];
 		i=i-1;
-		if(i==pos-1){
+		if(i==pos+lb-1){
 			break;
 		}
 	}
-	ip[pos]=item;
+	ip[pos+lb-1]=item;
 	cout<<"\n";
-	travarray(ip,lb,ub,10);
+	cout<<"Output Array:";
+    travarray(ip,lb,ub,10);
 }