Question

Using the variables shown below and a EOF-controlled loop write a set of C++ statements that accumulate the values read from the file in total as long as total does not get greater than max.

For example, if the content of the input file is: 10 25 17 6 24 23 12 5

For max = 100, the value in total should be 82 (10+25+17+6+24)

For max = 75, the value in total should be 58 (10+25+17+6)

Assume that max will never make your loop to read beyond the end of the file and the values in the file are all valid. Implement the loop using a while statement.

Initialize variables according to your needs. Display the value of total.

ifstream myInfile;

myInfile.open("input.txt");

int value;           // value read from file

int total;

int max = 75;

Must be in C++

Answer 1

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

/*Make sure to provide input.txt file at appropriate location
 * where your compiler can read text file
 * also make sure that name of input file must be input and
 * it must be a text file is having txt extension*/

int main(){
    ifstream myInfile;
    myInfile.open("input.txt");
    int value;
    int total;
    int max = 75;   /*try to change this value but make sure that it does not let the
 * program to reach the end of file as it is assured in the question that max will be
 * choosen such that it will never reach to end of file*/

    /*Below condition will test whether opening of text file was successful or not
     * you can delete this if code */
    if(!myInfile){
        cout << "Unable to open input file!\n";
    }

    total = 0;
    while(total < max){
        myInfile >> value;  //reading int by int from input.txt file

        if(total + value < max){
            total += value;
        }
        else{
            break;
        }
    }

    cout << "Sum total : "<<total << "\n";

    return 0;
}

Run CPROJECT c: \Users\VIREN CLionProjects\CPROJECT\Cmake-build-debug\CPROJECT.exe Sum total : 58 Process finished with exit code 0 IDE and Plugin Updates