简单计算器的问题

#include "stdafx.h"
#include <stdio.h>

void displaymenu()
{
printf("\n************************************\n");
printf("*********^^^welcome^^^****************\");
printf("**************************************\n");
printf("*1:ｼﾓｷｨ*\n");
printf("*2:ｼ?ｨ*\n");
printf("*3:ｳﾋｷｨ*\n");
printf("*4:ｳｷｨ*\n");
printf("*5:ﾇ?・\n");
printf("*6:ｽﾗｳﾋ*\n");
printf("*7:ﾀﾛｼﾓ*\n");
printf("*8:ｽ睫・\n");
printf("*************************************\n");
printf("*************************************\n");
printf("*******

#include <stdio.h>

void displaymenu()
{
printf("\n************************************\n");
printf("*********^^^welcome^^^****************\n");
printf("**************************************\n");
printf("*1:????*\n");
printf("*2:???*\n");
printf("*3:????*\n");
printf("*4:????*\n");
printf("*5:???\n");
printf("*6:????*\n");
printf("*7:????*\n");
printf("*8:?睫?\n");
printf("*************************************\n");
printf("*************************************\n");
printf("*************************************\n");
printf("??菠????奖?<1,2,3,4,5,6,7,8>?\n");
}

main()
{
while(1)
{
displaymenu();