static void writeStdVectorsToTextFile(const std::string fileName,
const std::vector<std::vector<T>>& vecs) {
std::ofstream fileStream;
openTextFileStream(fileStream, fileName);
writeStdVectorsToTextFileStream(fileStream, vecs);
closeFileStream(fileStream);
}
static void readFromTextFile(const std::string& fileName,
PlaceToWriteInput& placeToWriteInput) {
std::ifstream inputFileStream(fileName);
assert_true(inputFileStream.is_open());
inputFileStream >> placeToWriteInput;
closeFileStream(inputFileStream);
}
int main (void)
{
FILE *inputStream = NULL, /* File pointer for input file */
*outputStream = NULL; /* File pointer for output file */
int studentId1 = 0,
studentId2 = 0,
studentId3 = 0,
studentId4 = 0,
studentId5 = 0; /* 5 student IDs */
int studentClassStanding1 = 0,
studentClassStanding2 = 0,
studentClassStanding3 = 0,
studentClassStanding4 = 0,
studentClassStanding5 = 0; /* 5 student class standings */
double studentGpa1 = 0.0,
studentGpa2 = 0.0,
studentGpa3 = 0.0,
studentGpa4 = 0.0,
studentGpa5 = 0.0; /* 5 student GPAs */
double studentAge1 = 0.0,
studentAge2 = 0.0,
studentAge3 = 0.0,
studentAge4 = 0.0,
studentAge5 = 0.0; /* 5 student ages */
double sumGpa = 0.0, /* sum of the 5 student's GPA */
sumClassStanding = 0.0, /* sum of the 5 student's class standing */
sumAge = 0.0; /* sum of the 5 student's ages */
double meanGpa = 0.0, /* mean of the 5 student's GPA */
meanClassStanding = 0.0, /* mean of the 5 student's class standing */
meanAge = 0.0; /* mean of the 5 student's ages */
double deviationGpa1 = 0.0,
deviationGpa2 = 0.0,
deviationGpa3 = 0.0,
deviationGpa4 = 0.0,
deviationGpa5 = 0.0; /* deviation of each student's GPA */
double varianceGpa = 0.0, /* variance of the 5 student's GPA */
standardDeviationGpa = 0.0, /* standard variance of the 5 student's GPA */
maxStudentGpa = 0.0, /* maximum number out of the 5 student's GPA */
minStudentGpa = 0.0; /* minimum number out of the 5 student's GPA */
/* Opens an input file "input.dat" for reading; */
inputStream = openFileStream (INPUT_FILE, INPUT_FILE_MODE);
/* Opens an output file "output.dat" for writing; */
outputStream = openFileStream (OUTPUT_FILE, OUTPUT_FILE_MODE);
/* Checks the condition if files were successfully opened.
* If either file didn't open, then an error message is prompted,
* otherwise program will continue to execute other operations. */
if (inputStream == NULL || outputStream == NULL)
{
/* Files were not successfully opened and prompts user of the error.
* Program will not continue to execute the rest of the program. */
printf ("Error: Not able to open files!\n");
}
else
{
/* Reads five records from the input file (input.dat); */
/* Student 1 */
studentId1 = readInteger (inputStream);
studentGpa1 = readDouble (inputStream);
studentClassStanding1 = readInteger (inputStream);
studentAge1 = readDouble (inputStream);
/* Student 2 */
studentId2 = readInteger (inputStream);
studentGpa2 = readDouble (inputStream);
studentClassStanding2 = readInteger (inputStream);
studentAge2 = readDouble (inputStream);
/* Student 3 */
studentId3 = readInteger (inputStream);
studentGpa3 = readDouble (inputStream);
studentClassStanding3 = readInteger (inputStream);
studentAge3 = readDouble (inputStream);
/* Student 4 */
studentId4 = readInteger (inputStream);
studentGpa4 = readDouble (inputStream);
studentClassStanding4 = readInteger (inputStream);
studentAge4 = readDouble (inputStream);
/* Student 5 */
studentId5 = readInteger (inputStream);
studentGpa5 = readDouble (inputStream);
studentClassStanding5 = readInteger (inputStream);
studentAge5 = readDouble (inputStream);
/* Calculates the sum of the GPAs; */
sumGpa = calculateSum (studentGpa1, studentGpa2,
studentGpa3, studentGpa4,
studentGpa5);
/* Calculates the sum of the class standings; */
sumClassStanding = calculateSum (studentClassStanding1, studentClassStanding2,
studentClassStanding3, studentClassStanding4,
studentClassStanding5);
/* Calculates the sum of the ages; */
sumAge = calculateSum (studentAge1, studentAge2,
studentAge3, studentAge4,
studentAge5);
/* Calculates the mean of the GPAs; */
meanGpa = calculateMean (sumGpa, NUMBER_OF_STUDENTS);
/* Calculates the mean of the class standings; */
meanClassStanding = calculateMean (sumClassStanding, NUMBER_OF_STUDENTS);
/* Calculates the mean of the ages; */
meanAge = calculateMean (sumAge, NUMBER_OF_STUDENTS);
/* Calculates the deviation of each GPA from the mean */
deviationGpa1 = calculateDeviation (studentGpa1, meanGpa);
deviationGpa2 = calculateDeviation (studentGpa2, meanGpa);
deviationGpa3 = calculateDeviation (studentGpa3, meanGpa);
deviationGpa4 = calculateDeviation (studentGpa4, meanGpa);
deviationGpa5 = calculateDeviation (studentGpa5, meanGpa);
/* Calculates the variance of the GPAs */
varianceGpa = calculateVariance (deviationGpa1, deviationGpa2,
deviationGpa3, deviationGpa4,
deviationGpa5, NUMBER_OF_STUDENTS);
/* Calculates the standard deviation of the GPAs; */
standardDeviationGpa = calculateStandardDeviation (varianceGpa);
/* Determines the min of the GPAs; */
minStudentGpa = findMin (studentGpa1, studentGpa2,
studentGpa3, studentGpa4,
studentGpa5);
/* Determines the max of the GPAs; */
maxStudentGpa = findMax (studentGpa1, studentGpa2,
studentGpa3, studentGpa4,
studentGpa5);
/* Writing the result to the output file (output.dat) */
printDouble (outputStream, meanGpa);
printDouble (outputStream, meanClassStanding);
printDouble (outputStream, meanAge);
printDouble (outputStream, standardDeviationGpa);
printDouble (outputStream, minStudentGpa);
printDouble (outputStream, maxStudentGpa);
/* Closes the input and output files (i.e. input.dat and output.dat) */
closeFileStream (inputStream);
closeFileStream (outputStream);
}
return 0;
}
