Initial commit: C language learning code

翁凯C语言/1/Hello.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main()
+{  
+	int x;
+	int n=0;
+	
+	scanf("%d", &x);
+	
+	n++;
+	x=x/10;
+	while(x>10)
+	{
+		n++;
+		x=x/10;
+	}
+	printf("%d\n",n);
+	return 0;
+}
+
+     

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;
+}

翁凯C语言/1/guess.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main()
+{
+	srand(time(0));
+	int number = rand()%100+1;
+	int count = 0;
+	int a = 0;
+	printf("我已经想好了一个1到100之间的数。");
+	
+	do
+	{
+		printf("请猜这个1到100之间的数：");
+		scanf("%d", &a);
+		count = count+1;
+		
+		if(a>number)
+		{
+			printf("你猜的数大了。");
+		}
+		else if(a<number)
+		{
+			printf("你猜的数小了。");
+		}
+	}
+	while(a != number);
+	
+	printf("太好了，你用了%d次就猜对了。\n", count);
+}

翁凯C语言/1/倒序排列.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main()
+{
+	int x;
+	scanf("%d", &x);
+
+	int number;
+	int renum=0;
+
+	while(x>0)
+	{
+		number = x%10;
+		printf("%d", number);
+		renum = renum*10+number;
+		printf("x=%d, number=%d,renum=%d\n", x, number, renum);
+		x/=10;
+	}
+	printf("%d", renum);
+
+	return 0;
+}