Java 与 C++之不同的地方---语法篇

于 2007-03-29 21:59:29 发布 · 152 阅读

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#C #C++ #C# #Java #OS

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本文对比了C++与Java在变量初始化、字符数组定义、字符串操作等方面的语法差异，并举例说明了这些不同之处如何影响程序的编写。

C++:OK Java Error             Comma operator
    int a,b;
     a = (b=3,b+2);

Both ways of initializing variables are valid and equivalent in C++
int a = 5;
int b (10);
but in java we use int  a = 5; int b(10) is invalid

C++ :
   char ch_str = "success"; OK but char[] ch_str = "success"; ERROR in Java all Error!
but in java: char[] ch_str = {'s','u','c','c','e','s','s'};OK and also char ch_str[]=..;
C++:
string str = "mystr";
char *p = (char*)str.c_str();//be sure that (char*)!!
for(int i = 0;i  cout<<"pos "+i<<*p++;


}
result will be like this: pos 0.., os 1 .., s 2 ..
in Java will be like this: pos 0 m,pos 1 y,...
so  ....



C++ OK; Java Error: defMtdParams(10);