#include<stdio.h>
#include<limits.h> //还有表示整型大小的值
#include<float.h> //含有表示float和double类型大小的值
int main()
{
printf("The value of INT_MAX is %i\n",INT_MAX); //int 型最大值
printf("The value of INT_MIN is %i\n",INT_MIN); //int 型最小值
printf("An int takes %i bytes\n",sizeof(int)); //int所占字节
printf("The value of FLT_MAX is %f\n",FLT_MAX); //float
printf("The value of FLT_MIN is %f\n",FLT_MIN);
printf("An float takes %i bytes\n",sizeof(float));
printf("The value of CHAR_MAX is %i\n",CHAR_MAX); //char
printf("The value of CHAR_MIN is %i\n",CHAR_MIN);
printf("An char takes %i bytes\n",sizeof(char));
printf("The value of DBL_MAX is %lf\n",DBL_MAX); //double
printf("The value of DBL_MIN is %lf\n",DBL_MIN);
printf("An double takes %i bytes\n",sizeof(double));
printf("The value of SHRT_MAX is %i\n",SHRT_MAX); //short
printf("The value of SHRT_MIN is %i\n",SHRT_MIN);
printf("An short takes %i bytes\n",sizeof(short));
return 0;
}
问题1:8位、64位到底是什么意思?
答:从技术上讲,计算机的位数有多种含义,它既可以代表CPU指令的长度,也可以代表CPU一次从存储器读取数据的大小。实际上,位数是计算机能够处理的数值长度。
问题2:那这和int、double的大小有什么关系?
答:如果一台计算机能处理32位的数值,就会把基本数据类型(例如int)的大小设为32位。