C++ 面试题与答案
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问题 66. What are the differences between a C++ struct and C++ class?
The default member and base-class access specifier are different.
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问题 67. How many ways are there to initialize an int with a constant?
Two.
There are two formats for initializers in C++ as shown in the example that follows. The first format uses the traditional C notation. The second format uses constructor notation.
int foo = 123;
int bar (123);
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问题 68. How does throwing and catching exceptions differ from using setjmp and longjmp?
The throw operation calls the destructors for automatic objects instantiated since entry to the try block.
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问题 69. What is a default constructor?
Default constructor WITH arguments class B { public: B (int m = 0) : n (m) {} int n; }; int main(int argc, char *argv[]) { B b; return 0; }
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问题 70. What is a conversion constructor?
A constructor that accepts one argument of a different type.
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