The functions of the four operations are not given! I think it's very simple. It should be finished!
Do it yourself, and you will gain a lot! ! !
# include & ltstdio.h & gt
# include & ltiostream.h & gt
# include & ltwindows.h & gt
void main()
{
char c；
while( 1)
{
printf(" 1 . add \ n ")；
printf(" 2n ")；
printf(" 3 . mul \ n ")；
printf(" 4 . div \ n ")；
printf(" select:")；
CIN & gt； & gtc；
Switch (c)
{
Case "1":
printf(" 1 . add \ n ")；
//add()；
Break;
Case "2":
printf(" 2n ")；
//sub()；
Break;
Case "3":
printf(" 3 . mul \ n ")；
//mul()；
Break;
Case "4":
printf(" 4 . div \ n ")；
//div()；
Break;
Case "5":
printf(" 5 . exit \ n ")；
Exit (0);
Break;
Default value:
Printf ("Input error! \ n ")；
Break;
}
}
}