You are given a text file named datatxt The file contains a list of integer scores The number of scores is unknown You are required to write a C program to read ALL the scores from the?

Answer 1

#include

#include

#include

using std::cin;

using std::cout;

using std::endl;

using std::ifstream;

//function prototypes

int numberOfElements(ifstream& inData);

void readDataFromFile(ifstream& inData, long* dataFile, int arraySize);

int main()

{

const char fileName[] = "data.txt";

ifstream inData;

inData.open(fileName, std::ios::in);

if (inData.fail())

{

cout << endl << "Could not open the file: " << fileName << endl;

inData.close();

exit(1);

}

int numberOfLines = numberOfElements(inData);

cout << "Number of string is: " << numberOfLines << endl;

long* dataFile = new long[numberOfLines];

readDataFromFile(inData, dataFile, numberOfLines);

for (int index = 0; index < numberOfLines; index++)

{

cout << endl << *(dataFile + index) << endl;

}

delete [] dataFile;

system("PAUSE");

return 0;

} //calculate number of elemenets and return its value

int numberOfElements(ifstream& inData)

{

double data = 0.0;

int counter = 0;

while (inData >> data)

{

counter++;

}

inData.clear();

return counter;

}

//read data from file and save it in array dataFile with size arraySize

void readDataFromFile(ifstream& inData, long* dataFile, int arraySize)

{

for (int index = 0; index < arraySize; index++)

{

inData >> *(dataFile + index);

}

}