1 /*测试sizeof()  测试环境：windows 7  64位操作系统    VS2012编译器 */ 2 #include <iostream> 3 using namespace std; 4  5 int main() 6 { 7     char a; 8     short int b; 9     int c;10     long int d;11     float e;12     double f;13     long double g;14     int* h;15     double* i;16     float* j;17     string strArr1;18 19     cout << "sizeof(char) = " << sizeof(a) << endl;20     cout << "sizeof(short int) = " << sizeof(b) << endl;21     cout << "sizeof(int) = " << sizeof(c) << endl;22     cout << "sizeof(long int) = " << sizeof(d) << endl;23     cout << "sizeof(float) = " << sizeof(e) << endl;24     cout << "sizeof(double) = " << sizeof(f) << endl;25     cout << "sizeof(long double) = " << sizeof(g) << endl;26     cout << "sizeof(int*) = " << sizeof(h) << endl;27     cout << "sizeof(double*) = " << sizeof(i) << endl;28     cout << "sizeof(float*) = " << sizeof(j) << endl;29     cout << "sizeof(string) = " << sizeof(strArr1) << endl;30    31     system("pause");32 33     return 0;34 }