Added previous assignments

Assignment 2/main.c

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+/*
+ *Student: S.K Soekhlal
+ * Number: 4860632
+ * Assignment: 1.4
+ */
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<math.h>
+
+int main(){
+    double a,r,b=0,sum=0; /*Declaring variables*/
+    int N;
+    scanf("%lf%d%lf",&a,&N,&r); /*Storing inputted values in variables*/
+    for(;N>=0;--N){         /*Starting for loop to calculate sum*/
+        b = a * (pow(r,N)); /*calculating sum*/
+        sum += b;
+    }
+    printf("%.2f\n", sum);  /*Printing sum on the screen*/
+    return 0;
+}