初步完成第三题

homework1/test3.cpp

@@ -0,0 +1,32 @@
+#include <iostream>
+#include <iomanip>
+
+using namespace std;
+
+typedef struct {
+    string id;
+    string name;
+    double price;
+} book;
+
+void alter_to_110_percent(book *books, int length) {
+    for (int i = 0; i < length; i++) {
+        books[i].price = books[i].price * 1.1;
+    }
+}
+
+int main() {
+    book books[100];
+    int length = 0;
+    for (length = 0; true; length++) {
+        cin >> books[length].id >> books[length].name >> books[length].price;
+        if (books[length].id == "0" && books[length].name == "0" && books[length].price == 0) {
+            break;
+        }
+    }
+    alter_to_110_percent(books, length);
+    for (int i = 0; i < length; i++) {
+        cout << books[i].id << "\t" << books[i].name << "\t" << fixed << setprecision(2) << books[i].price << endl;
+    }
+    return 0;
+}