piano project error

hello guys!
I have a problem with the code I created. I've got the problem "stray '\ 346' in program" I do not know what that means, I think it's a character problem but not about:

here is my code:

#define NOTE_B0 31
int a=NOTE_B0;
#define NOTE_C1 33
int b=NOTE_C1;
#define NOTE_CS1 35
int c=NOTE_CS1;
#define NOTE_D1 37
int d=NOTE_D1;
#define NOTE_DS1 39
int e=NOTE_DS1;
#define NOTE_E1 41
int f=NOTE_E1;
#define NOTE_F1 44
int g=NOTE_F1;
#define NOTE_FS1 46
int h=NOTE_FS1 ;
#define NOTE_G1 49
int i=NOTE_G1;
#define NOTE_GS1 52
int j=NOTE_GS1;
#define NOTE_A1 55
int k=NOTE_A1;
#define NOTE_AS1 58
int l=NOTE_AS1;
#define NOTE_B1 62
int m=NOTE_B1;
#define NOTE_C2 65
int n=NOTE_C2;
#define NOTE_CS2 69
int o=NOTE_CS2;
#define NOTE_D2 73
int p=NOTE_D2;
#define NOTE_DS2 78
int q=NOTE_DS2;
#define NOTE_E2 82
int r=NOTE_E2;
#define NOTE_F2 87
int s=NOTE_F2;
#define NOTE_FS2 93
int t=NOTE_FS2;
#define NOTE_G2 98
int u=NOTE_G2;
#define NOTE_GS2 104
int v=NOTE_GS2;
#define NOTE_A2 110
int x=NOTE_A2;
#define NOTE_AS2 117
int y=NOTE_AS2;
#define NOTE_B2 123
int z=NOTE_B2;
#define NOTE_C3 131
int 1=NOTE_C3;
#define NOTE_CS3 139
int 2=NOTE_CS3;
#define NOTE_D3 147
int 3=NOTE_D3;
#define NOTE_DS3 156
int 4=NOTE_DS3;
#define NOTE_E3 165
int 5=NOTE_E3;
#define NOTE_F3 175
int 6=NOTE_F3;
#define NOTE_FS3 185
int 7=NOTE_FS3;
#define NOTE_G3 196
int 8=NOTE_G3;
#define NOTE_GS3 208
int 9=NOTE_GS3;
#define NOTE_A3 220
int *=NOTE_A3;
#define NOTE_AS3 233
int .=NOTE_AS3;
#define NOTE_B3 247
int !=NOTE_B3;
#define NOTE_C4 262
int ?=NOTE_C4;
#define NOTE_CS4 277
int /=NOTE_CS4;
#define NOTE_D4 294
int +=NOTE_D4;

int Buzz = 15;
const byte ROWS =8 ;
const byte COLS =5 ;
char keys [8][5]={
{'a','b','c','d','e',}
{'f','g','h','i','j',}
{'k','l','m','o','p',}
{'q','r','s','t','u',}
{'v','w','x','y','z',}
{'1','2','3','4','5',}
{'6','7','8','9','*',}
{'.','!','?','/','+',}
};
byte rowPins[ROWS]={1;2;3;4;5;6;7;8};
byte rowPins[COLS]={9;10;11;12;13;14};
Keypad Keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
void setup() {
Serial.begin(9600);
pinMode(Buzz,OUTPUT);
}

void loop() {
char key = keypad.getKey();

if(key !=NO_KEY){
Serial.println(key);
}
}

If you had posted your code in code tags, you could probably have hit "select", copied the code into an empty IDE sketch pane, and it would've compiled.

If only you'd read the posting guidelines.

Apart from this stuff int 4=NOTE_DS3;
That needs fixing properly

int *=NOTE_A3;
#define NOTE_AS3 233
int .=NOTE_AS3;
#define NOTE_B3  247
int !=NOTE_B3;
#define NOTE_C4  262
int ?=NOTE_C4;
#define NOTE_CS4 277
int /=NOTE_CS4;
#define NOTE_D4  294
int +=NOTE_D4;

WTF? You can't use *, ., !, ?, /, or + as variable names.