C and C + + language learning Summary (i)

Knowledge Structure:

1, If,for,switch,goto

2, #define, const

3, File copy code, dynamic generation of memory, compound expression, strcpy,memcpy,sizeof

4, function parameter transmission, memory allocation mode, memory error performance, malloc and new difference

5, class overload, hide and overwrite difference, extern problem, function parameter default value problem, macro code and inline function difference

6. Order of construction and deconstruction, string function definition

Specific implementation:

1, If,for,switch,goto

if:
bool int float pointer char How to use variables
bool bParam;
int iParam;
float fParam;
int* pParam;
char cParam;
if(bParam) ,if(!bParam);
if(iParam == 0 ),if(iParam != 0 );
if(fParam>= -0.00001 && fParam <= 0.00001);
if(pParam == NULL),if(pParam != NULL);
if(cParam == '\0'),if(cParam != '\0');

How to use If/else/return

if(condition) Can be equivalent toreturn (condition?x:y);
{
return x;
}
else
{
return y;
}
for: