diff --git a/csci218/Lect/ex3InClass.c b/csci218/Lect/ex3InClass.c
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+++ b/csci218/Lect/ex3InClass.c
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+//use onlinegdb.com
+// Example 3
+#include <stdio.h>
+
+int main(void) {
+  /* 
+    // declare an int variable: age
+  int age;
+    //declare a string: userName
+  char userName[100];
+    
+    //ask for the input, 
+    //Good practice: prompt some hint
+  printf("Enter Name and Age (serperated by space): ");
+  scanf("%s %d", userName, &age);
+    
+    //ask for name
+  
+    //ask for age
+    //display the infomation
+    
+  printf("Hello %s\nYou are %d years old.\n", userName, age);
+    //ask for more than one input
+   */
+
+  char letter;
+  printf("Please give me a letter: ");
+  scanf("%c", &letter);
+  printf("your letter is: %c\n", letter);
+ 
+   return 0;
+}
diff --git a/csci218/Lect/ex3InClass.out b/csci218/Lect/ex3InClass.out
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diff --git a/csci218/Lect/ex5InClass.c b/csci218/Lect/ex5InClass.c
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+++ b/csci218/Lect/ex5InClass.c
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+//Example 5 in Class
+#include <stdio.h>
+
+int main(void) {
+  char nameOfSchool[] = "CofC"; //variable declaration and assignment
+  int numOfStudent = 10000; //variable declaration and assignment
+  
+    /*i ncrease number of student by 1000 */
+  numOfStudent += 1000;   
+    
+    //using compound operators 
+    
+    
+    //printf("After one year, the numer of students in Cofc is %d\n", numOfStudentCofC);
+  printf("After one year, the number of students in Cofc is %d\n\n", numOfStudent);
+    /* declare integer x, y, z */
+  int x, y, z;
+  x = 0;
+  y = 2;
+  z = 3;
+    /* using compound operators */
+    // x = x + 6;
+    // y = y / 5;
+    // z = z * 5;
+  x += 6;
+  y /= 5;
+  z *= 5;
+  
+    //y = x++;
+    //int z = ++x;
+ 
+  
+     //printf("x = %d, y = %d, z = %d , nameOfAccountHolder = %s \n", x, y, z, nameOfAccountHolder);
+  printf("x = %d\ny = %d\nz = %d\n", x, y, z);
+
+  return 0;
+}
diff --git a/csci218/Lect/ex5InClass.out b/csci218/Lect/ex5InClass.out
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