符号常量要打出来在哪里?main函数里么?比如说:
#include <climits>
int main()
{
INT_MAX
int x;
……
return 0;
}
是这么用么?有什么用呢?可以定义X的取值范围么?
<climits>头文件怎么用?
答案:1 悬赏:0
解决时间 2021-04-09 13:29
- 提问者网友:我是我
- 2021-04-08 22:15
最佳答案
- 二级知识专家网友:许你一世温柔
- 2021-04-08 23:40
题主的问题有些散乱,所以我就按我的理解说了,符号常量顾名思义就是一个常量,把它当做一个普通的变量就可以了。因为int变量会由于编译器和操作系统位数的不同改变,所以我一般只是用以下的程序看看int等一些类型的取值范围。
题主说定义x的取值范围我不太懂,要是想检测x的取值的话确实可以用个if表达式大于小于地区分一下,可以详细地说一下吗
#include<iostream>
#include<climits>
using namespace std;
int main()
{
cout<<"charBit = "<<CHAR_BIT<<endl<<endl;
cout<<"charMax = "<<CHAR_MAX<<endl;
cout<<"charMin = "<<CHAR_MIN<<endl;
cout<<"unsignedCharMax = "<<UCHAR_MAX<<endl<<endl;
cout<<"signedCharMax = "<<SCHAR_MAX<<endl;
cout<<"signedCharMin = "<<SCHAR_MIN<<endl;
cout<<"unsignedCharMax = "<<UCHAR_MAX<<endl<<endl;
cout<<"shortMax = "<<SHRT_MAX<<endl;
cout<<"shortMin = "<<SHRT_MIN<<endl;
cout<<"unsignedShortMax = "<<USHRT_MAX<<endl<<endl;
cout<<"intMax = "<<INT_MAX<<endl;
cout<<"intMin = "<<INT_MIN<<endl;
cout<<"unsignedInt = "<<UINT_MAX<<endl<<endl;
cout<<"longMax = "<<LONG_MAX<<endl;
cout<<"longMin = "<<LONG_MIN<<endl;
cout<<"unsignedLongMax = "<<ULONG_MAX<<endl;
cin.get();
}
题主说定义x的取值范围我不太懂,要是想检测x的取值的话确实可以用个if表达式大于小于地区分一下,可以详细地说一下吗
#include<iostream>
#include<climits>
using namespace std;
int main()
{
cout<<"charBit = "<<CHAR_BIT<<endl<<endl;
cout<<"charMax = "<<CHAR_MAX<<endl;
cout<<"charMin = "<<CHAR_MIN<<endl;
cout<<"unsignedCharMax = "<<UCHAR_MAX<<endl<<endl;
cout<<"signedCharMax = "<<SCHAR_MAX<<endl;
cout<<"signedCharMin = "<<SCHAR_MIN<<endl;
cout<<"unsignedCharMax = "<<UCHAR_MAX<<endl<<endl;
cout<<"shortMax = "<<SHRT_MAX<<endl;
cout<<"shortMin = "<<SHRT_MIN<<endl;
cout<<"unsignedShortMax = "<<USHRT_MAX<<endl<<endl;
cout<<"intMax = "<<INT_MAX<<endl;
cout<<"intMin = "<<INT_MIN<<endl;
cout<<"unsignedInt = "<<UINT_MAX<<endl<<endl;
cout<<"longMax = "<<LONG_MAX<<endl;
cout<<"longMin = "<<LONG_MIN<<endl;
cout<<"unsignedLongMax = "<<ULONG_MAX<<endl;
cin.get();
}
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