Signed-off-by: xujinghao <xujinghao@sairate.fun>

未命名1.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int n;
+	cin >> n;
+	if(n >= 90){
+		cout << "优秀";
+	}
+	else if(n >= 75){
+		cout << "良好"; 
+	}
+	else if(n >= 60){
+		cout << "及格"; 
+	}
+	else{
+		cout << "不及格";
+	}
+	
+	
+	return 0;
+}

未命名2.cpp

@@ -0,0 +1,14 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int a,b,c,n;
+	cin >> n;
+	a = n / 100;
+	b = n / 10 % 10;
+	c = n % 100 % 10;
+	cout << c << b << a;
+	
+	
+	return 0;
+}
+

未命名3.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int x,a,y,b,z;
+	cin >>  x >> a >> y >> b;
+	z = (a*x - b*y) / (a - b);
+	cout << z;
+	
+	
+	
+	
+	
+	return 0;
+}
+