error C132: 'interrupt1': not in formal parameter list

Good Day, i am a novice programmer and am trying to compiler a code for micro controller AT89C52 using a reference code but i keep running to an error which seems to be causing other errors.

        #include <reg52.h>                                                                //header file

        sbit TSTART_1 = P1^2;
        sbit TSTART_2 = P1^3;
        sbit INP_1 = P1^0;
        sbit INP_2 = P1^1;

        sbit door_en = P2^5;
        sbit door_in1 = P2^4;
        sbit door_in2 = P2^1;
        sbit door_sw1 = P2^2;
        sbit door_sw2 = P2^3;

        sbit in1 = P3^1;
        sbit in2 = P3^2;
        sbit en1 = P3^0;
        sbit en2 = P3^3;
        sbit in3 = P3^4;
        sbit in4 = P3^5;

        sbit BUZZER = P3^6;
        sbit digit1 = P2^7;
        sbit digit2 = P2^6;
        sbit red_led = P1^4;
        sbit green_led = P1^5;

        sbit seg_A = P0^0;
        sbit seg_B = P0^1;
        sbit seg_C = P0^2;
        sbit seg_D = P0^3;
        sbit seg_E = P0^4;
        sbit seg_F = P0^5;
        sbit seg_G = P0^6;

        bit time_count_flag = 0x01;

        void delay1();
        void delay_3sec();
        void delay_buzzer();
        void timer0_init();
        void timer1_init();
        void display_led(unsigned char);

        int time_count=0, count, count1=0;