ADC output conversion problem

Code C - [expand]
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void main()
{
    int data[4];
    unsigned int b,c,d,z=0,e,i,f,a,x,p=0,g,h,j,k,l,o,q;
    unsigned int v;
    float t=0;
    long long m,n;
 
    PORTD=0x00;
    PORTC=0x00;
    PORTB=0x00;
    TRISD = 0x00;
        TRISB = 0x00;
        TRISC = 0x00;
    ADC_Init();
    
    f = ADC_Read(0);
 
    a = f;
    t=a/6.82;

Code C - [expand]
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unsigned char strADCVal[23];
float fAdcVal = 0.0;
 
void main()
{
     
    TRISA = 0x01;
    PORTA = 0x00;
    //ADCON1 register have to be configured
          
    while(1) {
    
        fAdcVal = ADC_Read(0) / 6.82;
        //if adc value is 1023 then 1023 / 6.82 = 150 (LM35 max o/p)
        //1023 should represent 150 that is Vref+ should be 1.5V
        FloatToStr(fAdcVal, strADCVal);
        LCD_Out(2,1,strADCVal);     
    }
}

Code C - [expand]
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unsigned char strADCVal[23];
float fAdcVal = 0.0;
 
void main()
{
     
    TRISA = 0x01;
    PORTA = 0x00;
    //ADCON1 register have to be configured
    //Configure CMCON here (disable Comparators)
     
    while(1) {
    
        fAdcVal = ADC_Read(0) / 2.046;
        
        FloatToStr(fAdcVal, strADCVal);
        LCD_Out(2,1,strADCVal);     
    }
}