add discount

pset3/5-discount.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+
+// Function prototype
+void calculate(int i); 
+
+int main(void) {
+  // Initialize variables
+  int t;      // Lines of input
+  int amount; // Amount of goods
+  int sum;    // Sum of goods
+  int temp;   // Temporary variable to store single price
+
+  scanf("%d", &t);
+
+  for (int i = 0; i < t; i++) {
+    sum = 0; // Sum should equal to 0 in each iteration
+    scanf("%d", &amount);
+    for (int j = 0; j < amount; j++) {
+      scanf("%d", &temp);
+      sum += temp;
+    }
+		calculate(sum);
+  }
+
+  return 0;
+}
+
+void calculate(int i) { // if cases and print discounted answer
+	if (i >= 400)
+		printf("%d\n", i - 160);
+	else if (i >= 300)
+		printf("%d\n", i - 110);
+	else if (i >= 200)
+		printf("%d\n", i - 70);
+	else if (i >= 100)
+		printf("%d\n", i - 30);
+	else
+		printf("%d\n", i);
+}