#include<stdio.h>
int main(){
	char a=0;
	int b=0;
	while(++a>0);
	printf("有有符号的char最大整数是%d\n",a-1);//为什么输出谁-129,不是127.
	while(++b>0);
	printf("有符号的int最大整数是%d\n",b-1);
	char d=127;
	d=d+1;
	printf("%d\n",d);
	d=d-1;
	printf("%d\n",d);
	unsigned char e=255;
	e=e+1;
		printf("%d\n",e);
		e=e-1;
			printf("%d\n",e);
}