add base conversion

conversions/进制转换.cpp

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h> 
+#include <string.h>
+
+const char f[]="0123456789ABCDEF";
+void A(int n,int m)
+{
+	int i=0;
+	char a[1000];
+	while(n)
+	{
+		a[i]=f[n%m];
+		n=n/m;
+		i++;
+	}
+	while(i--)
+	    printf("%c",a[i]);
+}
+
+void B(int n,int m)
+{
+	if(n<m)
+	{
+		if(n<10)
+		    printf("%d",n);
+		else
+		    printf("%c",n-10+'A');
+	}
+	else
+	{
+		B(n/m,m);
+		if(n%m<10)
+		    printf("%d",n%m);
+		else
+		    printf("%d",n%m-10+'A');
+	}
+}
+
+int main()
+{
+	int i,j;
+	printf("输入数字：\n");
+	scanf("%d",&i);
+	printf("输入要转换的进制：\n");
+	scanf("%d",&j);
+	printf("输出转换后的数字：");
+	B(i,j);
+	printf("\n");
+	A(i,j);
+	system("pause");
+	return 0;
+}