Question

written in c++

Write a program that reads a file consisting of students’ test scores in the range 0–200. 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.
Output the score ranges and the number of students. (Run your program with the following input data:76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189

Answer 1

Below is the code in C++ for the above question:

#include<iostream>
#include<fstream>
#include<sstream>
using namespace std;
int main()
{
//ifstream object.
ifstream file;
//opens file scores.txt
file.open("scores.txt");
//range array consists count of scores in the range
int range[8]={0};
char ch;
string st="";
//reading file character by character.
while(file >> ch){
//if character ch is ',' then we change string st to int and reset st="";
if(ch==','){
//converting string st to int.
stringstream change(st);
int x =0;
change >> x;
if(x >=0 && x<=24){ //increment range 0-24
range[0]++;
}
else if(x >=25 && x<=49){
range[1]++; //increment range 25-49
}
else if(x >=50 && x<=74){
range[2]++; //increment range 50-74
}
else if(x >=75 && x<=99){
range[3]++; //increment range 75-99
}
else if(x >=100 && x<=124){
range[4]++; //increment range 100-124
}
else if(x >=125 && x<=149){
range[5]++; //increment range 125-149
}
else if(x >=150 && x<=174){
range[6]++; //increment range 150-174
}
else if(x >=175 && x<=200){
range[7]++; //increment range 175-200
}
st="";//reseting string st to empty string.
}
else
st+=ch;
}
//converting last string st to int using stringstream
stringstream change(st);
int x =0;
change >> x;
file.close();
//checking for last score.
if(x >=0 && x<=24){ //increment range 0-24
range[0]++;
}
else if(x >=25 && x<=49){
range[1]++; //increment range 25-49
}
else if(x >=50 && x<=74){
range[2]++; //increment range 50-74
}
else if(x >=75 && x<=99){
range[3]++; //increment range 75-99
}
else if(x >=100 && x<=124){
range[4]++; //increment range 100-124
}
else if(x >=125 && x<=149){
range[5]++; //increment range 125-149
}
else if(x >=150 && x<=174){
range[6]++; //increment range 150-174
}
else if(x >=175 && x<=200){
range[7]++; //increment range 175-200
}
  
//printing range and with their count
int range1=0,range2=24;
for(int i=0;i<7;i++){
cout << range1 << "-" << range2 << " = " << range[i] << endl;
range1=range2+1;
range2=range1+24;
}
//printing last range 175-200 with count.
cout << range1 << "-" << range2+1 << " = " << range[7] << endl;
return 0;
}

Input File:
(scores.txt)
76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189


Refer to the screenshot attached below to better understand the code and indentation:





Output:


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