C ++ classroom practice two

1. The type of data and the number of bytes it occupies

#include

#include<string>

using namespace std;



int main(){

 cout << "********** *****************************" << endl;

 cout << "int:"<< sizeof(int ) << endl;

 cout << "short int:"<< sizeof(short int) << endl;

 cout << "long int:"<< sizeof(int) << endl;

 cout << "unsigned int:"<< sizeof(unsigned int) << endl;

 cout << "unsigned short int:"<< sizeof(unsigned short< /span> int) << endl;

 cout << "unsigned long int:"<< sizeof(unsigned long< /span> int) << endl;

 cout << "char:"<< sizeof(char ) << endl;

 cout << "unsigned char:"<< sizeof(unsigned char) << endl;

 cout << "bool:"<< sizeof(bool ) << endl;

 cout << "double:"<< sizeof(double ) << endl;

 cout << "float:"<< sizeof(float ) << endl;

 cout << "********** *****************************" << endl;

 cout << "A:" << sizeof(' A') << endl ;

 cout << "1:" << sizeof(1 ) << endl;

 cout << "1.0:" << sizeof(1.0 ) << endl;

 cout << "True:" << sizeof(true ) << endl;

 cout << "hello World:" << sizeof("Hello World") << endl;

 cout << "Program:" << sizeof(" Program") << endl ;

 cout << "********** *****************************" << endl;

 return 0;

} 

< /p>

#include

#include<string>

#include

using namespace std;



int main(){

 cout << "int			 Number of sections:" << sizeof(int)<< "		min:" << (numeric_limits<int>::min)() << "		max: " << (numeric_limits<int>::max)()<< endl;

 cout << "Bytes occupied by short int		 Number:" << sizeof(short int)<< "		min:" << (numeric_limits<short int>::min)() << " 		max:" << (numeric_limits<short int>::max)()<< endl;

 cout << "Bytes occupied by long int		 Number:" << sizeof(long int) << "		min:" << (numeric_limits<long int>::min)() << " 		max:" << (numeric_limits<long int>::max)()<< endl;

 cout << "Bytes occupied by unsigned int		 Number:" << sizeof(unsigned int)<< "		min:" << (numeric_limitsint>::min)() < <"			max:" << (numeric_limitsint>::max)()<< endl;

 cout << "The number of bytes occupied by unsigned short int	 :" << sizeof(unsigned short int)<< "		min:" << (numeric_limitsshort int>::min)() << "			max:" << (numeric_limitsshort int>::max)()<< endl;

 cout << "The number of bytes occupied by unsigned long int	 :" << sizeof(unsigned long int)<< "		min:" << (numeric_limitslong int>::min)() << "			max:" << (numeric_limitslong int>::max)()<< endl;

 cout << "char			 Number of sections:" << sizeof(char) << "		min:" << (numeric_limits<char>::min)() << "			max:" << (numeric_limits<char>::max)()<< endl;

 cout << "Bytes occupied by signed char		 Number:" << sizeof(signed char)<< "		min:" << (numeric_limitschar>::min)() < <"			max:" << (numeric_limitschar>::max)()<< endl;

 cout << "bytes occupied by unsigned char		 Number:" << sizeof(unsigned char)<< "		min:" << (numeric_limitschar>::min)() < <"			max:" << (numeric_limitschar>::max)()<< endl;

 cout << "bool			 Number of sections:" << sizeof(bool)<< "		min:" << (numeric_limits<bool>::min)() << "			max:" << (numeric_limits<bool>::max)()<< endl;

 cout << "string			 Number of sections:" << sizeof(string)<< "		min:" << (numeric_limits<string>::min)() << "			max:" << (numeric_limits<string>::max)()<< endl;

 cout << "double			 Number of sections:" << sizeof(double)<< "		min:" << (numeric_limits<double>::min)() << "	max:"< /span> << (numeric_limits<double>::max)()<< endl;

 cout << "The word occupied by float			 Number of sections:" << sizeof(float)<< "		min:" << (numeric_limits<float>::min)() << "	max:"< /span> << (numeric_limits<float>::max)()<< endl;

 return 0;

} 

< /p>

#include

#include<string>

using namespace std;



int main(){

 cout << "********** *****************************" << endl;

 cout << "int:"<< sizeof(int ) << endl;

 cout << "short int:"<< sizeof(short int) << endl;

 cout << "long int:"<< sizeof(int) << endl;

 cout << "unsigned int:"<< sizeof(unsigned int) << endl;

 cout << "unsigned short int:"<< sizeof(unsigned short< /span> int) << endl;

 cout << "unsigned long int:"<< sizeof(unsigned long< /span> int) << endl;

 cout << "char:"<< sizeof(char ) << endl;

 cout << "unsigned char:"<< sizeof(unsigned char) << endl;

 cout << "bool:"<< sizeof(bool ) << endl;

 cout << "double:"<< sizeof(double ) << endl;

 cout << "float:"<< sizeof(float ) << endl;

 cout << "********** *****************************" << endl;

 cout << "A:" << sizeof(' A') << endl ;

 cout << "1:" << sizeof(1 ) << endl;

 cout << "1.0:" << sizeof(1.0 ) << endl;

 cout << "True:" << sizeof(true ) << endl;

 cout << "hello World:" << sizeof("Hello World") << endl;

 cout << "Program:" << sizeof(" Program") << endl ;

 cout << "********** *****************************" << endl;

 return 0;

} 

#include

#include<string>

#include

using namespace std;



int main(){

 cout << "int			 Number of sections:" << sizeof(int)<< "		min:" << (numeric_limits<int>::min)() << "		max: " << (numeric_limits<int>::max)()<< endl;

 cout << "Bytes occupied by short int		 Number:" << sizeof(short int)<< "		min:" << (numeric_limits<short int>::min)() << " 		max:" << (numeric_limits<short int>::max)()<< endl;

 cout << "Bytes occupied by long int		 Number:" << sizeof(long int) << "		min:" << (numeric_limits<long int>::min)() << " 		max:" << (numeric_limits<long int>::max)()<< endl;

 cout << "Bytes occupied by unsigned int		 Number:" << sizeof(unsigned int)<< "		min:" << (numeric_limitsint>::min)() < <"			max:" << (numeric_limitsint>::max)()<< endl;

 cout << "The number of bytes occupied by unsigned short int	 :" << sizeof(unsigned short int)<< "		min:" << (numeric_limitsshort int>::min)() << "			max:" << (numeric_limitsshort int>::max)()<< endl;

 cout << "The number of bytes occupied by unsigned long int	 :" << sizeof(unsigned long int)<< "		min:" << (numeric_limitslong int>::min)() << "			max:" << (numeric_limitslong int>::max)()<< endl;

 cout << "char			 Number of sections:" << sizeof(char) << "		min:" << (numeric_limits<char>::min)() << "			max:" << (numeric_limits<char>::max)()<< endl;

 cout << "Bytes occupied by signed char		 Number:" << sizeof(signed char)<< "		min:" << (numeric_limitschar>::min)() < <"			max:" << (numeric_limitschar>::max)()<< endl;

 cout << "bytes occupied by unsigned char		 Number:" << sizeof(unsigned char)<< "		min:" << (numeric_limitschar>::min)() < <"			max:" << (numeric_limitschar>::max)()<< endl;

 cout << "bool			 Number of sections:" << sizeof(bool)<< "		min:" << (numeric_limits<bool>::min)() << "			max:" << (numeric_limits<bool>::max)()<< endl;

 cout << "string			 Number of sections:" << sizeof(string)<< "		min:" << (numeric_limits<string>::min)() << "			max:" << (numeric_limits<string>::max)()<< endl;

    cout << "double			所占字节数：" << sizeof(double)<< "		min:" << (numeric_limits<double>::min)() << "	max：" << (numeric_limits<double>::max)()<< endl;

    cout << "float			所占字节数：" << sizeof(float)<< "		min:" << (numeric_limits<float>::min)() << "	max：" << (numeric_limits<float>::max)()<< endl;

 return 0;

}