P51:第七题

#include <stdio.h>
#include<stdlib.h>
int main()
{
   
char a,b,c;
printf("输入两个数值：\n");
scanf("%c %c",&a,&b);
c = a-b;
if(c%2==0) 
if(a>b)
{
 a++;
printf("%c\n",a);
}
else if(c%2 != 0)
printf("%c\n",(b+1));

return 0;
}