added 4.c to class codes

Changes to be committed:
	new file:   assignment-3/4-if-even-odd
	modified:   others/classes/2023-04-11/2.c
	modified:   others/classes/2023-04-11/3.c
	new file:   others/classes/2023-04-11/4.c

Changes not staged for commit:
	deleted:    assignment-3/4-if-even-odd

others/classes/2023-04-11/2.c

@@ -5,14 +5,28 @@
 int main() {
     int arr[20], sodd =0 , seven=0, i;
 
+    printf("Enter 20 numbers : ");
+
     // takes 20 input
     for ( i = 0; i < 20;i++){
         scanf("%d", &arr[i]);
     }
 
-    // comparision using ternary operator for even or odd
+    // comparision for even or odd
     for ( i = 0; i < 20; i++){
+        // comparision using ternary operator for even or odd
         arr[i]%2 == 0 ? (seven += arr[i]) : (sodd += arr[i]);
+
+
+        // comparision using if else operator for even or odd
+        // if ( arr[i] == 0){
+        //     // if even 
+        //     seven += arr[i];
+        // }
+        // else{
+        //     // if odd
+        //     sodd += arr[i];
+        // }
     }
 
     // printing result

others/classes/2023-04-11/3.c

@@ -5,6 +5,8 @@
 int main() {
     int arr[20], sum =0, i, temp, count;
 
+    printf("Enter 10 numbers : ");
+
     // taking 10 input
     for ( i = 0; i < 10;i++){
         scanf("%d", &arr[i]);
@@ -20,8 +22,16 @@ int main() {
             temp/=10;
         }
 
-        // cheching if 2 digit number 
+        // checking if 2 digit number 
         count == 2 ? (sum += arr[i]) : (sum += 0);
+
+        // checking if 2 digit number using if else
+
+        // if (count == 2){
+        //     // if 2 digit number
+        //     sum += arr[i];
+        // }
+
     }
     printf("Sum of all two digit numbers : %d", sum);
     return 0;

others/classes/2023-04-11/4.c

@@ -0,0 +1,30 @@
+// WAP to take input of 10 number, display product of all numbers divisible by 5.
+#include <stdio.h>
+
+int main() {
+
+    int arr[10], product = 1, i;
+
+    printf("Enter 10 numbers : ");
+
+    // Taking input of 10 numbers
+    for (i = 0; i < 10; i++){
+        scanf("%d",&arr[i]);
+    }
+
+    // product of numbers,which is multiple of 5
+    for (i = 0; i < 10; i++){
+        // checking if divisible by 5 using ternary operator
+        arr[i]%5 == 0 ? (product *= arr[i]) : (product *= 1);
+
+        // checking if divisible by 5 using if operator
+        // if (arr[i]%5 == 0){
+        //     // if divisible by 5
+        //     product *= arr[i];
+        // }
+    }    
+
+    // printing result
+    printf("Product = %d",product);
+    return 0;
+}