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C++中的常用类型有bool、char、short、int、long、double、float、string等。这些数据类型满足了我们日常变成的需求。
下面的代码用来打印出各数据类型对应的占字节数及其最大值和最小值。
1 #include<iostream> 2 #include<string> 3 #include <limits> 4 #include <climits> 5 using namespace std; 6 7 int main() 8 { 9 cout << "bool: \t\t" << "所占字节数：" << sizeof(bool); 10 cout << "\t最大值：" << (numeric_limits<bool>::max)(); 11 cout << "\t\t\t最小值：" << (numeric_limits<bool>::min)() << endl; 12 cout << "char: \t\t" << "所占字节数：" << sizeof(char); 13 cout << "\t最大值：" << (numeric_limits<char>::max)(); 14 cout << "\t\t\t最小值：" << (numeric_limits<char>::min)() << endl; 15 cout << "signed char: \t" << "所占字节数：" << sizeof(signed char); 16 cout << "\t最大值：" << (numeric_limits<signed char>::max)(); 17 cout << "\t\t\t最小值：" << (numeric_limits<signed char>::min)() << endl; 18 cout << "unsigned char: \t" << "所占字节数：" << sizeof(unsigned char); 19 cout << "\t最大值：" << (numeric_limits<unsigned char>::max)(); 20 cout << "\t\t\t最小值：" << (numeric_limits<unsigned char>::min)() << endl; 21 cout << "wchar_t: \t" << "所占字节数：" << sizeof(wchar_t); 22 cout << "\t最大值：" << (numeric_limits<wchar_t>::max)(); 23 cout << "\t\t\t最小值：" << (numeric_limits<wchar_t>::min)() << endl; 24 cout << "short: \t\t" << "所占字节数：" << sizeof(short); 25 cout << "\t最大值：" << (numeric_limits<short>::max)(); 26 cout << "\t\t\t最小值：" << (numeric_limits<short>::min)() << endl; 27 cout << "int: \t\t" << "所占字节数：" << sizeof(int); 28 cout << "\t最大值：" << (numeric_limits<int>::max)(); 29 cout << "\t\t最小值：" << (numeric_limits<int>::min)() << endl; 30 cout << "unsigned: \t" << "所占字节数：" << sizeof(unsigned); 31 cout << "\t最大值：" << (numeric_limits<unsigned>::max)(); 32 cout << "\t\t最小值：" << (numeric_limits<unsigned>::min)() << endl; 33 cout << "long: \t\t" << "所占字节数：" << sizeof(long); 34 cout << "\t最大值：" << (numeric_limits<long>::max)(); 35 cout << "\t\t最小值：" << (numeric_limits<long>::min)() << endl; 36 cout << "unsigned long: \t" << "所占字节数：" << sizeof(unsigned long); 37 cout << "\t最大值：" << (numeric_limits<unsigned long>::max)(); 38 cout << "\t\t最小值：" << (numeric_limits<unsigned long>::min)() << endl; 39 cout << "double: \t" << "所占字节数：" << sizeof(double); 40 cout << "\t最大值：" << (numeric_limits<double>::max)(); 41 cout << "\t\t最小值：" << (numeric_limits<double>::min)() << endl; 42 cout << "long double: \t" << "所占字节数：" << sizeof(long double); 43 cout << "\t最大值：" << (numeric_limits<long double>::max)(); 44 cout << "\t\t最小值：" << (numeric_limits<long double>::min)() << endl; 45 cout << "float: \t\t" << "所占字节数：" << sizeof(float); 46 cout << "\t最大值：" << (numeric_limits<float>::max)(); 47 cout << "\t\t最小值：" << (numeric_limits<float>::min)() << endl; 48 cout << "size_t: \t" << "所占字节数：" << sizeof(size_t); 49 cout << "\t最大值：" << (numeric_limits<size_t>::max)(); 50 cout << "\t最小值：" << (numeric_limits<size_t>::min)() << endl; 51 cout << "string: \t" << "所占字节数：" << sizeof(string); 52 cout << "\t最大值：" << (numeric_limits<string>::max)(); 53 cout << "\t\t\t最小值：" << (numeric_limits<string>::min)() << endl; 54 cout << "long long: \t" << "所占字节数：" << sizeof(long long); 55 cout << "\t最大值：" << (numeric_limits<unsigned long long>::max)(); 56 cout << "\t最小值：" << (numeric_limits<unsigned long long>::min)() << endl; 57 return 0; 58 }
程序的运行结果如下图所示。
从程序运行的结果可以得出以下结论：
对上述结果做如下补充解释：
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原文地址：http://www.cnblogs.com/blog-wzy/p/5592088.html
