ASCII码与字符转换源代码

#include<iostream.h>
#include<stdlib.h>
#include<conio.h>
main()
{
int a,b,x;
char c,d;
while(1)
{
cout<<"\t\t*********ASCII码值与对应的字符相互转换器*********"<<endl;
cout<<"\t\t*\t\t\t\t\t\t*"<<endl;
cout<<"\t\t*\t1:将ASCII码值转化为对应的字符；\t\t*"<<endl;
cout<<"\t\t*\t2:将字符转化为对应的ASCII码值；\t\t*"<<endl;
cout<<"\t\t*\t3:退出。\t\t\t\t*"<<endl;
cout<<"\t\t*\t\t\t\t\t\t*"<<endl;
cout<<"\t\t*************************************************";
cout<<endl;
cout<<"\t\t请选择：";
cin>>x;

if(x==3)
break;
else
{
switch(x)
{
case 1:
{
cout<<"\t请输入ASCII码值：";
cin>>a;