符号なし16進数文字列を10進数に変換

int HexToDec(char *src){

    // src                  

    // src="001A"，   26

    //   src   '\0'      

    int value=0,srclen=strlen(src);

    int i;

    for(i=0;i 
  
        if(src[i]<='9'&&src[i]>='0'){
  
            value=value*16+(int)(src[i]-'0');
  
        }
  
        else if(src[i]<='f'&&src[i]>='a'){
  
            value=value*16+(int)(src[i]-'a'+10);
  
        }else{
  
            value=value*16+(int)(src[i]-'A'+10);
  
        }
  
    }
  
    return value;//        
  
}