Question

Write a program that reads students test scores in the range 0-200 from a file until end of file (use e of() to check if ifstream reaches the End of File Stream) and store those scores in an array. It should then determine the number of students having scores in each of the following ranges: 0-24, 25-49, 50-74, 75-99, 100- 124, 125–149, 150-174, and 175–200. Finally, the program outputs the total number of students, each score range and the number of students in this range. In addition, the program outputs each student's score, followed by test score, followed by the test grade. Assume the following grade scale: 90%-100% A; 80%-89.99%,B; 70%-79.99%, C; 60%-69.99%, D; and 0%-59.99%, F. Before runningyourprogram, store the following data into the text file "StudentScores.txt": (7689 150 135 200 7612 100 150 28 178189 167 200 1751508799 129 14917620087 35 157189) Sample input/output: Enter the input file name (with extension <= 50 characters): StudentScores.txt The total number of students is: 26 Ranges of test's scores have the following stats: 0 - 24 25 - 49 50 - 74 | 75 - 99 100 - 124 125 - 149 150 - 174 175 - 200 ------------------- Student scores and grades 1. Student score: 76 = Grade: F 2. Student score: 89 = Grade: F 3. Student score: 150 = Grade: C 4. Student score: 135 = Grade: D 5. Student score: 200 = Grade: A 6. Student score: 76 = Grade: F 7. Student score: 12 = Grade: F 8. Student score: 100 = Grade: F 9. Student score: 150 = Grade: C 10. Student score: 28 = Grade: F ll. Student score: 178 = Grade: B 12. Student score: 189 = Grade: A 13. Student score: 167 = Grade: B | 14. Student score: 200 = Grade: A | 15. Student score: 175 16. Student score: 150 17. Student score: 87 18. Student score: 99 19. Student score: 129 20. Student score: 149 21. Student score: 176 22. Student score: 200 23. Student score: 87 24. Student score: 35 25. Student score: 157 26. Student score: 189 = Grade: B = Grade: C = Grade: F = Grade: F = Grade: D = Grade: C = Grade: B = Grade: A = Grade: F = Grade: F = Grade: C = Grade: A

codeblock c++ language

Answer 1

#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

int main(){
   ifstream inFile1;
   string file_name,tmp;

   cout<<"Enter the input file name (with extension <= 50 characters): "; //Enterring the file name
   cin>>file_name;
   cout<<endl;
   inFile1.open(file_name);   //opening the file
   if (!inFile1) {
   cerr << "Unable to open file "<<file_name<<endl; //checking if file opened without any error
   exit(1); // call system to stop
   }
   int x,count=0;
   while(!inFile1.eof()){
       inFile1>>x;
       count++;   //count of students
   }
   inFile1.close();

   inFile1.open(file_name);
   int marks[count];       //array to store marks
   int marks_range[8]={0,0,0,0,0,0,0,0};   //array to store count of marks in each range
   for(int i=0;!inFile1.eof();i++) {
       inFile1>>marks[i];       // storing marks in an array
   }
   inFile1.close();
   cout<<std::string(50, '-')<<endl;
   cout<<"The total number of students is: "<<count<<endl;   //printing the total number of students
   cout<<std::string(50, '-')<<endl;

   for(int i=0;i<count;i++){       //counting the numbers of marks in a range
       if(marks[i]>=0 && marks[i]<=24){  
           marks_range[0]++;
       }
       else if(marks[i]>=25 && marks[i]<=49){
           marks_range[1]++;
       }
       else if(marks[i]>=50 && marks[i]<=74){
           marks_range[2]++;
       }
       else if(marks[i]>=75 && marks[i]<=99){
           marks_range[3]++;
       }
       else if(marks[i]>=100 && marks[i]<=124){
           marks_range[4]++;
       }
       else if(marks[i]>=125 && marks[i]<=149){
           marks_range[5]++;
       }
       else if(marks[i]>=150 && marks[i]<=174){
           marks_range[6]++;
       }
       else{
           marks_range[7]++;
       }
   }

   int lower,upper;
   for(int i=0;i<8;i++){   //printing the count of marks in each range
       if(i==7){
           lower=175;
           upper=200;
       }
       else{
           lower=i*25;
           upper=lower+24;
       }
       tmp=to_string(lower)+" - "+to_string(upper);
       cout<<left<<setw(15)<<tmp;
       cout<<marks_range[i]<<endl;
   }

   cout<<std::string(50, '-')<<endl;
   cout<<"Students scores and grades"<<endl;
   cout<<std::string(50, '-')<<endl;

   float avg;
   for(int i=0;i<count;i++){   //printing the grades based on average
       cout<<right<<setw(2)<<i+1<<". Student score: ";
       cout<<left<<setw(3)<<marks[i]<<" = Grade: ";
       avg=(marks[i]/200.0)*100;
       if(avg>=90.0 && avg<=100.0){
           cout<<'A'<<endl;
       }
       else if(avg>=80.0 && avg<90.0){
           cout<<'B'<<endl;
       }
       else if(avg>=70.0 && avg<80.0){
           cout<<'C'<<endl;
       }
       else if(avg>=60.0 && avg<70.0){
           cout<<'D'<<endl;
       }
       else{
           cout<<'F'<<endl;
       }
   }
   cout<<std::string(50, '-')<<endl;
}


2 #include <fstream> #include <iostream> #include <iomanip> #include <string> using namespace std; 4 int main() { ifstream inFilel; string file_name, tmp; cout<<"Enter the input file name (with extension <= 50 characters): "; //Enterring the file name cin>>file name; cout<<endl; inFilel.open(file name); //opening the file if (!inFilel) { cerr << "Unable to open file "<<file name<<endl; // checking if file opened without any error exit(1); // call system to stop int x, count=0; while(!inFilel.eof() { inFilel>>X; count++; //count of students inFilel.close(); inFilel.open(file_name); int marks [count]; //array to store marks int marks range [8]={0,0,0,0,0,0,0,0}; //array to store count of marks in each range for(int i=0;!inFilel.eof();i++) { inFilel>>marks[i]; // storing marks in an array inFilel.close(); cout<<std::string(50, '-')<<endl; cout<<"The total number of students is: "<<count<<endl; //printing the total number of students cout<<std::string(50, '-')<<endl;

for(int i=0;i<count;i++) { //counting the numbers of marks in a range if(marks[i]>=6 && marks[i]<=24) { marks_range[]++; else if(marks[i]>=25 && marks[i]<=49) { marks_range[1]++; else if(marks[i]>=50 && marks[i]<=74) { marks_range[2]++; else if(marks[i]>=75 && marks[i]<=99) { marks_range [3]++; else if(marks[i]>=100 && marks[i]<=124){i marks_range[4]++; else if(marks[i]>=125 && marks[i]<=149) { marks_range [5]++; else if(marks[i]>=150 && marks[i]<=174){i marks_range [6]++; else{ marks_range [7]++;

//printing the count of marks in each range int lower, upper; for(int i=0;i<8;i++){ if(i==7) { lower=175; upper=200; else{ lower=i*25; upper=lower+24; tmp=to string(lower)+" - "+to string(upper); cout<<left<<setw(15) <<tmp; cout<<marks_range[i]<<endl; cout<<std::string(50, '-')<<endl; cout<<"Students scores and grades"<<endl; cout<<std::string(50, '-')<<endl;

float avg; for(int i=0;i<count;i++) { //printing the grades based on average cout<<right<<setw(2)«<i+1<<". Student score: "; cout<<left<<setw(3) <<marks[i]<<" = Grade: "; avg=(marks[i]/200.0)*100; if(avg>=90.0 && avg<=100.0){ cout<<'A'<<endl; else if(avg>=80.0 && avg<90.0){ cout<<'B'<<endl; else if(avg>=70.0 && avg<80.0){ cout<<'C'<<endl; else if(avg>=60.0 && avg<70.0){ cout<<'D'<<endl; else{ cout<<'F'<<endl; 102 103 104 105 cout<<std::string(50, '-')<<endl; 106 } 107

optimus@optimus-TravelMate-P243-M:-/Desktops g++ 1. cpp, optimus@optimus-TravelMate-P243-M:--/Desktop$ ./a.out Enter the input file name (with extension = 50 characters): 1.txt The total number of students is: 26 0 - 24 25 - 49 50 - 74 75 - 99 100 - 124 125 - 149 150 - 174 175 - 200 HNOLOHMinco Students scores and grades 1. Student score: 76 = Grade: F 2. Student score: 89 = Grade: F 3. Student score: 150 = Grade: C 4. Student score: 135 = Grade: D 5. Student score: 200 = Grade: A 6. Student score: 76 = Grade: F 7. Student score: 12 = Grade: F 8. Student score: 100 = Grade: F 9. Student score: 150 = Grade: C 10. Student score: 28 = Grade: F 11. Student score: 178 = Grade: B 12. Student score: 189 = Grade: A 13. Student score: 167 = Grade: B 14. Student score: 200 = Grade: A 15. Student score: 175 = Grade: B 16. Student score: 150 = Grade: C 17. Student score: 87 = Grade: F 18. Student score: 99 = Grade: F 19. Student score: 129 = Grade: D 20. Student score: 149 = Grade: C 21. Student score: 176 = Grade: B 22. Student score: 200 = Grade: A 23. Student score: 87 = Grade: F 24. Student score: 35 = Grade: F 25. Student score: 157 = Grade: C 26. Student score: 189 = Grade: A