/*Write a C++ program with the following features: 1. Function main asks the user to enter a name of a file and then it reads the name of the file. 2. The file mentioned should have the following contents. The first line is (the contents must be in the given format): SSN Exam 1 Exam 2 A1 A2 A3 Then each following line will contain the record of one student. The last 4 digits of his/her SSN must be listed under SSN. His/her grade in Exam1 must be listed under Exam1. Exam1 is out of 100. His/her grade in Exam2 must be listed under Exam2. Exam2 is out of 100. His/her grade in Assignment 1 must be listed under A1. A1 is out of 50. His/her grade in Assignment 2 must be listed under A2. A2 is out of 50. His/her grade in Assignment 3 must be listed under A3. A3 is out of 50. For example, assume that John has a record in that file and assume that the last 4 digits of his SSN are 4306 and assume his grade in Exam1 is 85, in Exam2 is 98, in Assignment1 is 40, in Assignment2 is 45, and in Assignment3 is 49. Then the following line must be in the file: 4306 85 98 40 45 49 Assume the grades are real-valued (i.e. they may contain fractional parts). 3. Then function main calls a void function called CSIT121 and passes to it the name of the file entered by the user. This means the only input parameter to CSIT121 should be the name of the file. 4. Function CSIT121 must do the following: (a) It opens the file whose name was entered by the user for reading. (b) It opens another file called Grades.txt for writing. (c) On the first line of file Grades.txt, function CSIT121 should write the following SSN Course grade (d) Then function CSIT121 calculates the numeric course grade of each student and writes to a separate line of file Grades.txt, the last 4 digits of his/her SSN, followed by his/her numeric course grade. When you calculate the numeric course grade, assume each exam consists 30% of the course grade and the assignments (all together) consist 40% of the course grade (assume the assignments have the same weight). The numeric course grade should be out 100 and should have zero decimal places. So, you should declare numeric course grade to be of type float and then write it to file Grades.txt with 0 decimal places. For example, if the student's numeric course grade is 79.6, then his/her numeric course grade must be recorded on file Grades.txt as 80. Each line of file Grades.txt must contain the last 4 digits of the SSN of one student and his/her numeric course grade, listed in the order shown in the first line of file Grades.txt. I.e. the last 4 digits of the SSN come first, then the numeric course grade. (e) Function CSIT121 calculates the minimum numeric course grade in the class and the maximum numeric course grade and the average (of numeric course grades) of class. Each one of the previous ones should be of type float. (f) Then function CSIT121 writes (should be the last line of file Grades.txt) to file Grades.txt, the minimum numeric course grade with zero decimal places, the maximum numeric course grade with zero decimal places, and the average with zero decimal places. For example, if the minimum numeric course grade is 67.523334 and the maximum numeric course grade is 97.473089, and the average is 83.821874, then the last line of Grades.txt should be as follows: Minimum: 68. Maximum: 97. Average: 84. (g) Then function CSIT121 returns the minimum numeric course grade, the maximum course numeric grade, and the average to function main. 5. Then function main displays the minimum numeric course grade, the maximum numeric course grade, and the average as they were written on Grades.txt. Using the example above, what should be displayed by function main is: Minimum: 68. Maximum: 97. Average: 84. 6. There should be no global variables in your program and function CSIT121 should be of type void. 7. File opening, closing, and processing and also all calculations must be done in function CSIT121. 8. Function main should not do file processing at all and it should do no calculations. It should only read the name of the input file, calls function CSIT121, and display the 3 values returned by function CSIT121. Example: Suppose that the contents of file Test.dat are as follows: SSN Exam1 Exam2 A1 A2 A3 1234 56 77 30 40 50 4321 45 77 44 43 34 6778 56 88 43 41 45 Here's a sample run: Enter the name of the input file: Test.dat Minimum: 69. Maximum: 78. Average: 73. Press any key to continue The contents of file Grades.txt are now SSN Course Grade 1234 72 4321 69 6778 78 Minimum: 69. Maximum: 78. Average: 73. Solution: */ #include #include #include #include using namespace std; void CSIT121(string FileName,float& Min,float& Max, float& Average); int main() { float Min, Max, Average; string FileName; cout << "Enter the name of the input file: "; cin >> FileName; CSIT121(FileName,Min,Max,Average); cout << "Minimum: " << fixed << setprecision(0) << Min << ". "; cout << "Maximum: " << fixed << setprecision(0) << Max << ". "; cout << "Average: " << fixed << setprecision(0) << Average << "." << endl; return 0; } void CSIT121(string FileName,float& Min,float& Max, float& Average) { string St1,St2,St3,St4,St5,St6; ifstream inFile; ofstream outFile; int SSN, Count = 0; float Numeric, Exam1, Exam2, A1, A2, A3; inFile.open(FileName.c_str()); if ( !inFile ) { cout << "Can't open the file" << endl; exit(1); } Average = 0; Min = 1000; Max = -1; outFile.open("Grades.txt"); outFile << "SSN" << setw(30) << "Course Grade" << endl; inFile >> St1 >> St2 >> St3 >> St4 >> St5 >> St6; inFile >> SSN >> Exam1 >> Exam2 >> A1 >> A2 >> A3; /*cout << SSN << " " << Exam1 <<" " << Exam2 << " " << A1 << " " << A2 << " " << A3 << endl; */ while ( inFile ) { Count++; Numeric = 0; Numeric = Numeric + 0.3 * (Exam1 + Exam2) + (4.0/15.0)*(A1+A2+A3); outFile << SSN << setw(30) << fixed << setprecision(0) << Numeric << endl; Average = Average + Numeric; if (Numeric > Max) Max = Numeric; if (Numeric < Min) Min = Numeric; inFile >> SSN >> Exam1 >> Exam2 >> A1 >> A2 >> A3; } Average = Average/Count; outFile << "Minimum: " << fixed << setprecision(0) << Min << ". "; outFile << "Maximum: " << fixed << setprecision(0) << Max << ". "; outFile << "Average: " << fixed << setprecision(0) << Average << "." << endl; inFile.close(); outFile.close(); }