C float與char數組 互轉

 

 
           
           //轉換float數據到字節數組  
unsigned char i;  
float floatVariable;  
unsigned char charArray[4];  
(unsigned char) *pdata = ((unsigned char)*)&floatVariable;  //把float類型的指針強制轉換為unsigned char型  
for(i=0;i<4;i++)  
{  
    charArray[i] = *pdata++;//把相應地址中的數據保存到unsigned char數組中       
}  
  
//轉換字節數組到float數據  
float   floatVariable;  
unsigned char  i;   
void   *pf;       
pf = &floatVariable;   
(unsigned char) * px = charArray;    
  
for(i=0;i<4;i++)  
{  
    *(((unsigned char)*)pf+i)=*(px+i);       
}