Declare in C == define in C++?

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What is the difference between a definition and a declaration?

Is it correct that to declare in C is equal to define in C++?

int a;     /* to declare variabel a in C */
int b = 2; /* to declare and initialize in C */


int c;     // to define in C++ 
int d = 4; // to define and initialize in C++ 

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No.

For functions, I've seen "declare" being used for just writing the header, whereas "define" was used for writing the body.

However, it's all natural language. "declare" as in you C example seems correct for both C and C++.

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In C, declaring means to tell the compiler it exists whereas defining is assigning an actual value to it.

I see no reason why this would be different in C++

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是的，它应该是

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