Finding a error of c141

#include <reg51.h>
#define DATA P0;
void lcd_init(void);
void lcd_cmd(unsigned char);
void key_scan (void);
void delay_ms(unsigned int);
sbit RS = P2^5;
sbit RW = P2^6;
sbit en = P2^7;
unsigned char R,C,ch;
unsigned char Key[4][4]={'0','1','2','3','4',
'5','6','7','8','9',
'A','B','C','D','E','F'};
void main()
{
P1=0xff;
DATA=0x00;
lcd_init();
delay_ms(100);
lcd_cmd (0x80);
while(1)
{
key_scan(); delay_ms (5);
ch = Key[R][C]; delay_ms(5);
lcd_display(ch);delay_ms(5);
lcd_cmd(0x01);
}
}
void key_scan (void)
{
P1=0x0F;
while (P1==0x0F);
if(P1== 0x0D)
R = 0;
else if (P1==0x0B);
R = 1;
else if (P1==0x0D);
R = 2;
else if (P1==0x07);
R = 3;

P1=0xF0;
while (P1==0xF0);
if(P1==0xE0);
C = 0
else if (P1==0xD0);
C = 1
else if (P1==0xB0);
C = 2
else if (P1==0x70);
C = 3
delay_ms (20);
}
void lcd_cmd(unsigned char cmnd)
{
DATA = cmnd
RS=0;RW=0;en=1;
delay_ms(10);
en=0;
}
void lcd_display(unsigned char dat)
{
DATA = dat;
RS=1;RW=0;en=1;
delay_ms(10);
en=0;
}
void lcd_init (void)
{
lcd_cmd (0x38);
lcd_cmd (0x0e);
lcd_cmd (0x06);
lcd_cmd (0x01);
}
void delay_ms(unsigned int k)
{
unsigned int i,j;
for(i=0;i<=k;i++)
{
for(j=0;j<1275;j++);
}
}

can anyone find the error in this program.Its giving an error in the highlighted line.The error is error C141: syntax error near '=', expected '__asm'