c整数类型 C++ 整数类型

// Writing values of variables to cout 
#include <iostream> 

int main() 
{ 
  int apple_count {15};                            // Number of apples 
  int orange_count {5};                            // Number of oranges 
  int total_fruit {apple_count + orange_count};    // Total number of fruit 
  
  std::cout << "The value of apple_count is "  << apple_count  << std::endl; 
  std::cout << "The value of orange_count is " << orange_count << std::endl; 
  std::cout << "The value of total_fruit is "  << total_fruit  << std::endl; 
} 

#include <iostream> 
#include <climits>              // use limits.h for older systems 
int main() { 
     using namespace std; 
     int n_int = INT_MAX;        // initialize n_int to max int value 
     short n_short = SHRT_MAX;   // symbols defined in climits file 
     long n_long = LONG_MAX; 
     long long n_llong = LLONG_MAX; 

     // sizeof operator yields size of type or of variable 
     cout << "int is " << sizeof (int) << " bytes." << endl; 
     cout << "short is " << sizeof n_short << " 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 << "int: " << n_int << endl; 
     cout << "short: " << n_short << endl; 
     cout << "long: " << n_long << endl; 
     cout << "long long: " << n_llong << endl << endl; 

     cout << "Minimum int value = " << INT_MIN << endl; 
     cout << "Bits per byte = " << CHAR_BIT << endl; 
     return 0; 
} 

#include <iostream> 
#include <climits>  // defines INT_MAX as largest int value 
#define ZERO 0      // makes ZERO symbol for 0 value 

int main() 
{ 
     using namespace std; 
     short s = SHRT_MAX;     // initialize a variable to max value 
     unsigned short sue = s;

     cout << "s has " << s << " dollars and Sue has " << sue; 
     cout << "Add $1 to each account." << endl << "Now "; 
     s = s + 1; 
     sue = sue + 1; 
     cout << "s has " << s << " dollars and Sue has " << sue; 
     s = ZERO; 
     sue = ZERO; 
     cout << "s has " << s << " dollars and Sue has " << sue; 
     s = s - 1; 
     sue = sue - 1; 
     cout << "s has " << s << " dollars and Sue has " << sue; 
     cout << "Hi!" << endl; 
     return 0; 
} 

#include <iostream> 
int main() 
{ 
    using namespace std; 
    int my_decimal = 42;     // decimal integer literal 
    int my_hexi = 0x42;      // hexadecimal integer literal 
    int my_oct = 042;        // octal integer literal 

    cout << "my_decimal = " << my_decimal << " (42 in decimal)n"; 
    cout << "my_hexi = " << my_hexi << " (0x42 in hex)n"; 
    cout << "my_oct = " << my_oct << " (042 in octal)n"; 
    return 0; 
} 

#include <iostream> 
using namespace std; 
int main() 
{ 
     int my_decimal = 42; 
     int my_hexi = 42; 
     int my_oct = 42; 

     cout << "my_decimal = " << my_decimal << " (decimal for 42)" << endl; 
     cout << hex;      // manipulator for changing number base 
     cout << "my_hexi = " << my_hexi << " (hexadecimal for 42)" << endl; 
     cout << oct;      // manipulator for changing number base 
     cout << "my_oct = " << my_oct << " (octal for 42)" << endl; 
     return 0; 
} 

#include <iostream>                    // For output to the screen 
int main() 
{ 
  unsigned int yards =10, feet =10, inches =10; 
   
  const unsigned int feet_per_yard {3U}; 
  const unsigned int inches_per_foot {12U}; 
  unsigned int total_inches {}; 
  total_inches = inches + inches_per_foot*(yards*feet_per_yard + feet); 
  std::cout << "The distances corresponds to " << total_inches << " inches.n"; 
  
  std::cout << "Enter a distance in inches: "; 
  std::cin >> total_inches; 
  feet = total_inches/inches_per_foot; 
  inches = total_inches%inches_per_foot; 
  yards = feet/feet_per_yard; 
  feet = feet%feet_per_yard; 
  std::cout << "The distances corresponds to " 
            << yards  << " yards " 
            << feet   << " feet " 
            << inches << " inches." << std::endl; 
}