Added a C Program for Compound Interest

C/compound_interest.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <math.h>
+
+int main(void){
+    double principal, rate, amount;
+    int years, i;
+
+    printf("Enter the principal: ");
+    scanf("%lf", &principal);
+    printf("Enter the rate: ");
+    scanf("%lf", &rate);
+    printf("Enter the number of years: ");
+    scanf("%d", &years);
+
+    printf("Year\tAmount on deposit \n");
+
+    for (i = 1; i <= years; i++){
+        amount = principal * pow(1 + rate, i);
+        printf("%d\t%.2f \n", i, amount);
+    }
+
+    return 0;
+}