C++ Input/output -

#include <iostream> #include <fstream>  using namespace std;  int main() {     int , b , c , , n;     int d = 0;  ifstream myfile;  myfile.open("duomenys1.txt");  myfile >> n;  (int = 0; < n; i++ )  {      myfile >> >> b >> c;      d +=  (a + b + c)/3 ;  } ofstream myotherfile; myotherfile.open ("rezultatai1.txt"); myotherfile << d; myotherfile.close(); myotherfile.close(); return 0; } 

the programs should read 3 (3 n) rows of numbers (5 7 4 ; 9 9 8; 8 7 8), rows summed separately , given 3 different averages (7 ; 9 ; 8) in rezultatai1.txt file. -2143899376 result.

the problem isn't huge number, need program give every row's average number separately in output file, in output file written (7 ; 9 ; 8)

you must make 1 output per line , must use floating point arithmetic followed rounding if want rounded averages.

#include <iostream> #include <iostream> #include <cmath>  int main() {   const int numbers_per_lines = 3;   std::ofstream output("rezultatai1.txt");   std::ifstream input("duomenys1.txt");   int number_of_lines;   input >> number_of_lines;   for(int i=0; i<number_of_lines; ++i) {     double sum=0;     for(int num=0; num<numbers_per_line; ++num) {       double x;       input >> x;       sum += x;     }     output << << ' ' << std::round(sum/numbers_per_line) << std::endl;   } }