#include<climits>
int main()
{
using namespace std;
int n_int=INT_MAX;
short n_short=SHRT_MAX;
long n_long=LONG_MAX;
long long n_llong=LLONG_MAX;
// float is 4 bytes.
// double is 8 bytes.
cout<<"char is "<<sizeof(char)<<" bytes."<<endl;
cout<<"unsigned char is "<<sizeof(unsigned char)<<" bytes."<<endl;
cout<<"short is "<<sizeof n_short<<" bytes."<<endl;
cout<<"unsigned short is "<<sizeof(unsigned short)<<" bytes."<<endl;
cout<<"int is "<<sizeof(int)<<" bytes."<<endl;
cout<<"unsigned is "<<sizeof(unsigned)<<" bytes."<<endl;
cout<<"long is "<<sizeof n_long<<" bytes."<<endl;
cout<<"long long is "<<sizeof n_llong<<" bytes."<<endl;
cout<<endl;
cout<<"Maximum values"<<endl;
cout<<"char : "<<CHAR_MAX<<endl;
cout<<"U char : "<<UCHAR_MAX<<endl;
cout<<"int : "<<n_int<<endl;
cout<<"U int : "<<UINT_MAX<<endl;
cout<<"short : "<<n_short<<endl;
cout<<"U SHORT : "<<USHRT_MAX<<endl;
cout<<"long : "<<n_long<<endl;
cout<<"long long : "<<n_llong<<endl<<endl;
cout<<"Minimum values"<<endl;
cout<<"char : "<<CHAR_MIN<<endl;
cout<<"int : "<<INT_MIN<<endl;
cout<<"short : "<<SHRT_MIN<<endl;
cout<<"long : "<<LONG_MIN<<endl;
cout<<"long long : "<<LLONG_MIN<<endl<<endl;
cout<<"Bits per byte = "<<CHAR_BIT<<endl;
return 0;
}
ubuntu系统下输出结果：
char is 1 bytes.
unsigned char is 1 bytes.
short is 2 bytes.
unsigned short is 2 bytes.
int is 4 bytes.
unsigned is 4 bytes.
long is 8 bytes. // ----windows下是4
long long is 8 bytes.
Maximum values
char : 127
U char : 255
int : 2147483647
U int : 4294967295
short : 32767
U SHORT : 65535
long : 9223372036854775807//-----windows下是 2147483647
long long : 9223372036854775807
Minimum values
char : -128
int : -2147483648
short : -32768
long : -9223372036854775808//-----windows下是 2147483648
long long : -9223372036854775808
Bits per byte = 8
