<h2 style="color:red">示例</h2>中所使用的CSS的引入方式是()。
A.行内引入
B.内嵌式引入
C.链接式引入
D.综合引入
- · 有3位网友选择 D,占比30%
- · 有3位网友选择 C,占比30%
- · 有2位网友选择 A,占比20%
- · 有2位网友选择 B,占比20%
A.行内引入
B.内嵌式引入
C.链接式引入
D.综合引入
A、application
B、session
C、request
D、page
B、Hello, C++ !
C、Main end. Hello, C++ !
D、Hello, C++ ! Main end.
A、5
B、3
C、30
D、15
A、7
B、0
C、5
D、20
A、fread (a , sizeof(struct std),30 , fp) ;
B、fread (&a[i] , sizeof(struct std),1 , fp) ;
C、fread (a +i, sizeof(struct std),1 , fp) ;
D、fread (a , struct std,30 , fp) ;
调试程序,写出程序的输出结果,并解释 #include <iostream> #include <iostream> using namespace std; class complex { public: complex() { real = imag = 0.0; } complex(double r) { real = r; imag = 0.0; } complex(double r, double i) { real = r; imag = i; } friend complex operator + (const complex &c1, const complex &c2); friend complex operator - (const complex &c1, const complex &c2); friend complex operator * (const complex &c1, const complex &c2); friend complex operator / (const complex &c1, const complex &c2); friend void print(const complex &c); private: double real, imag; }; complex operator+ (const complex &c1, const complex &c2) { return complex(c1.real + c2.real, c1.imag + c2.imag); } complex operator-(const complex &c1, const complex &c2) { return complex(c1.real - c2.real, c1.imag - c2.imag); } complex operator * (const complex &c1, const complex &c2) { return complex(c1.real*c2.real - c1.imag * c2.imag, c1.real*c2.imag + c1.imag * c2.real); } complex operator/(const complex &c1, const complex &c2) { return complex((c1.real*c2.real + c1.imag * c2.imag) / (c2.real*c2.real) / (c2.real*c2.real + c2.imag*c2.imag), (c1.imag*c2.real - c1.real * c2.imag) / (c2.real)*(c2.real + c2.imag*c2.imag)); } void print(const complex &c) { if (c.imag < 0) cout << c.real << c.imag << "i"; else cout << c.real << "+" << c.imag << "i"; } int main() { complex c1(2.0), c2(3.0, -1.0), c3; c3 = c1 + c2; cout << "\ncl+c2="; print(c3); c3 = c1 - c2; cout << "\nc1-c2="; print(c3); c3 = c1 * c2; cout << "\ncl*c2="; print(c3); c3 = c1 / c2; cout << "\nc1/c2="; print(c3); c3 = (c1 + c2)*(c1 - c2) * c2 / c1; cout << "\n(c1 + c2)*(c1 - c2) * c2 / c1="; print(c3); cout << endl; return 0; }
A、20,x
B、20,y
C、10,x
D、10,y
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