Initial commit: C language learning code

翁凯C语言/1/average math.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main()
+{
+	int number;
+	int sum = 0;
+	int count = 0;
+	
+	printf("请输入数字\n");
+	scanf("%d", &number);
+	while(number!=-1)
+	{
+		sum = sum+number;
+		count = count+1;
+		printf("请输入数字\n");
+		scanf("%d", &number);	
+	}
+	
+	if (count > 0)
+    {
+        printf("平均数是%.2f\n", (float)sum / count);
+    }
+    else
+    {
+        printf("未输入有效数字\n");
+    }
+		
+	return 0;
+}