feat: update 1108

Author: treeforest

PAT/1108/main.cpp

@@ -0,0 +1,42 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <iostream>
+#include <cstdio>
+#include <string.h>
+using namespace std;
+int main() {
+	int n, cnt = 0;
+	char a[50], b[50];
+	double temp, sum = 0.0;
+	cin >> n;
+	for (int i = 0; i < n; i++) {
+		//memset(a, 0, 50 * sizeof(char));
+		scanf("%s", a);
+		sscanf(a, "%lf", &temp);
+		sprintf(b, "%.2f", temp);
+		int flag = 0;
+		for (int j = 0; j < strlen(a); j++) {
+			if (a[j] != b[j]) {
+				flag = 1;
+				break;
+			}
+		}
+		if (flag || temp < -1000 || temp > 1000) {
+			printf("ERROR: %s is not a legal number\n", a);
+			continue;
+		}
+		else {
+			sum += temp;
+			cnt++;
+		}
+	}
+	if (cnt == 0) {
+		printf("The average of 0 numbers is Undefined");
+	}
+	else if (cnt == 1) {
+		printf("The average of 1 number is %.2f", sum);
+	}
+	else {
+		printf("The average of %d numbers is %.2f", cnt, sum / cnt);
+	}
+	return 0;
+}