Added previous assignments

Assignment 3/.vscode/settings.json

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+{
+    "files.associations": {
+        "stdio.h": "c"
+    }
+}

Assignment 3/main.c

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+/*
+ *Student: S.K Soekhlal
+ * Number: 4860632
+ * Assignment: 2.12
+ */
+#include<stdio.h>
+#include<stdlib.h>
+#include<math.h>
+
+int main(){
+    int a=0,i,temp=0; /*Declaring variables*/
+    scanf("%d",&a); /*Storing user input in variabl a*/
+    if(a < 2){  /*Testing if input is 0 or 1*/
+        printf("%d is not a prime number\n",a); /*We don't see 1 as a prime number*/
+    }
+    else
+    {
+        for(i=2; pow(i,2)<=a; i++){  /*using for loop to determine if input is not prime*/
+            if (a%i == 0){  /*If remainder of a/i = 0 then the number is not prime*/
+                temp = 1;
+                break;
+            }
+        }
+        if(temp == 1){
+            printf("%d is not a prime number\n",a);  
+            }
+        else{
+            printf("%d is a prime number\n",a);
+        }
+    }
+    return 0;
+}