computer science

Question

Consider the following structure definition and solve the following problems.

typedef struct {

int phoneID; // unique ID will start from 1 up to N.

char phoneName[50];

int price;

int ramMemory;

float cpuSpeed;

int gpuMemory;

char userName[50];

int userPhoneNo;

char userCountry[50];

} SmartPhoneType;

1. Write a program that will read 5 mobile’s information from the user and save it in a file named “mobileInfo.txt”.

2. Write a function that will print all the information of a specific smart phone. Use the prototype - void printPhoneInfo(SmartPhoneType phoneType);

3. Print all the information of the phone using the function mentioned in the Question 2 which has the highest price. Use the prototype - void getHighestPricePhone ( SmartPhoneType mobileList[], int size, SmartPhoneType *highestPricePhone);

4. Write a function that will find all the devices from a specific country and print the information using the function mentioned in the Question 2. Use the prototype - void countryWisePhone( SmartPhoneType mobileList[], int size, char *country);

5. write a function that will delete all the information of a specific smart phone from the file. Use the function prototype – void deletePhone(SmartPhoneType mobileList[], int size, int phoneID);

Answer 1

int WritePhoneFile(TPhoneDB phoneDB, char * filename)

{

int iReturn=0;

int iLoop;

char outbuff[255];

FILE * fptr = fopen(filename,"w");

if (fptr!=NULL)

{

fprintf(fptr,"%d %d \n",phoneDB->count,phoneDB->phoneSeqNum);

for (iLoop=0; iLoop<phoneDB->count; iLoop++)

{

SmartPhone_SerializeToCSV(&phoneDB->phones[iLoop],outbuff);

fprintf(fptr,outbuff);

}

}

else

{

iReturn=-1;

}

return(iReturn);

}

void getHighestPricePhone ( SmartPhoneType mobileList[], int size, SmartPhoneType *highestPricePhone)

{

int indexOfMaxPos=0;

int maxPrice=mobileList[0].price;

int iLoop;

for (iLoop=0; iLoop<size; iLoop++)

{

if (mobileList[iLoop].price>maxPrice)

{

indexOfMaxPos = iLoop;

maxPrice = mobileList[iLoop].price;

}

}

memcpy(highestPricePhone,&mobileList[indexOfMaxPos],SMART_PHONE_SIZE);

}

void SmartPhone_Input(TSmartPhone phone)

{

printf(" Please input the phone name :>");

scanf("%s",phone->phoneName);

printf(" Please input the phone price :>");

scanf("%d",&phone->price);

printf("Please input the ram memory :>");

scanf("%d",&phone->ramMemory);

printf("Please input the cpu speed :>");

scanf("%f",&phone->cpuSpeed);

printf("Please input the gpu memory :>");

scanf("%d",&phone->gpuMemory);

printf("Please input the username :>");

scanf("%s",phone->userName);

printf(" Please input the # :>");

scanf("%d",&phone->userPhoneNo);

printf(" Please input the country :>");

scanf("%s",phone->userCountry);

}

void My5Phones(TPhoneDB phoneDB)

{

int iLoop=0;

phoneDB->count=phoneDB->phoneSeqNum=5;

phoneDB->phones=(TSmartPhone)malloc(5*SMART_PHONE_SIZE);

for (iLoop=0; iLoop<5; iLoop++)

{

phoneDB->phones[iLoop].phoneID=(iLoop+1);

SmartPhone_Input(&phoneDB->phones[iLoop]);

SmartPhone_Output(&phoneDB->phones[iLoop]);

}

WritePhoneFile(phoneDB,"E:\\mobileInfo.txt");

}

void countryWisePhone( SmartPhoneType mobileList[], int size, char *country)

{

int iLoop;

for (iLoop=0; iLoop<size; iLoop++)

{

if (strcmp(mobileList[iLoop].userCountry,country)==0)

{

SmartPhone_Output(&mobileList[iLoop]);

printf("\n");

}

}

}

void deletePhone(SmartPhoneType mobileList[], int size, int phoneID)

{

int iIndexPos=-1;

int iLoop=0;

//locates the phone rec with the specified id

for (iLoop=0; iLoop<size; iLoop++)

{

if (mobileList[iLoop].phoneID == phoneID)

{

iIndexPos=iLoop; //found it!!!

break;

}

}

if (iIndexPos>-1) //it is there

{

//moves each phone rec one position to the left, clobbering the target record

for (iLoop=iIndexPos; iLoop<size-1; iLoop++)

{

memcpy(&mobileList[iLoop],&mobileList[iLoop+1],SMART_PHONE_SIZE);

}

memset(&mobileList[size-1],0,SMART_PHONE_SIZE); //invalidates the last record

}

size--;

/* NEXT, you have to write this array containing size-1 records to the file, whose name is

neither specified, nor passed */

}