Create Lecture - 21.cpp

Author: Prince-1501

Lecture - 21.cpp

@@ -0,0 +1,35 @@
+#include <iostream>
+#include <cstring>
+using namespace std;
+int main()
+{
+    // problem 1.
+    /*int a[10]={0};
+    cout<<a[5]<<endl;
+    
+    int b[10]={21};  // method wrong ... and luckily valid for only 0 (zero )
+    cout<<b[5]<<endl;  */
+    
+    // problem 2.
+   /* int n ; cin>>n;
+    int a[n]={0};
+    cout<<a[5]<<endl; */
+    
+    // solution of these problem
+    // memset ()
+    int n;
+    cout<<"Input the size of array"<<endl;
+    cin>>n;
+    int a[n]; // block name --- a
+    memset(a,0 ,sizeof(a));  // value --> 0 & -1
+    cout<<a[4]<<endl;
+    
+    int val[9];
+    memset(val, -1 , sizeof(val));
+    for(int i=0;i<9;i++)
+    {
+        cout<<val[i]<<" ";
+    }
+    cout<<endl;
+    
+}