Programming language

Question

What the television needs to know () and does ()

Answer 1

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

typedef

class Television

{

protected:

int channel;

bool on_off_flag;

public:

Television()

{

channel = 0; on_off_flag = true;

}

int GetChannel() { return(channel); }

int SetChannel(int x) { if (x>=0) { channel=x; } } //can you change the channel if the TV is off

void ChannelUP() { channel++; }

void ChannelDOWN() { if (this->channel) { channel--; } }

On() { on_off_flag = true; }

Off() { on_off_flag = false; }

bool IsOn() { return(on_off_flag==true); }

bool IsOff() { return(on_off_flag==false); }

Television(const Television& tv)

{

this->channel = tv.channel;

this->on_off_flag = tv.on_off_flag;

}

void SerializeToStrCSV(char * csvBuff)

{

sprintf(csvBuff,"%d,%d \n",this->channel,this->on_off_flag);

}

Television(char * csvBuff)

{

this->channel = atoi( strtok(csvBuff,","));

this->on_off_flag = (atoi( strtok(NULL,","))==1);

}

void Dump(char * strMsg=NULL,FILE * fptr=stdout )

{

if (strMsg!=NULL)

{

fprintf(fptr,"***************************************************\n");

fprintf(fptr,strMsg); fprintf(fptr,"\n");

}

fprintf(fptr,"***************************************************\n");

fprintf(fptr," channel = %d : on_off_flag = %d",this->channel, this->on_off_flag);

fprintf(fptr,"\n");

}

} * TTelevision;

#define TV_SIZE (sizeof(Television))

#define TV_BUFF_SIZE (25)

int main()

{

Television tv1;

Television tv2;

char tvCSVbuff[] = "169,1";

Television tv3(tvCSVbuff);

tv1.On();

tv1.SetChannel(27); tv1.Dump();

tv1.SetChannel(21); tv1.Dump();

tv1.SetChannel(33); tv1.Dump();

tv2.On();

tv2.SetChannel(45);

for (int iLoop=0; iLoop<10; iLoop++) { tv2.ChannelUP() ; }

for (int iLoop=0; iLoop<5; iLoop++) { tv2.ChannelDOWN(); }

tv2.Dump((char*)"TV #2"); //channel 50

char tvBuffCSV[TV_BUFF_SIZE];

tv3.SerializeToStrCSV(tvBuffCSV);

printf(tvBuffCSV);

}