C语言求long的最大范围和最小范围

今天在做POJ的题是遇到了大数问题，就想编程支持long的最大值范围。

	long max = 1;
	printf("sizeof(long ) = %d \n",sizeof(long)); //long类型数据占的字节数bytes
	printf("sizeof(int ) = %d \n",sizeof(int));   
	printf("sizeof(long long ) = %d \n",sizeof(long long));
	printf("Max of long is %ld \n",~(max<<(sizeof(long)*8-1)));//long 的最大值
	printf("Min of long is %ld \n",(max<<(sizeof(long)*8-1))); //long 的最小值

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