cpp starter file in out

main_io.cpp

#include <stdio.h>

char line[1024];

void operateOnFiles(FILE* fin, FILE* fout) {
  printf("Files Ok..\n");
  
  while (!feof(fin)){
    fgets(line, 1024, fin);
    printf("%s", line);  // Start Here
  }
}

int main(int argc, char** argv) {
  FILE* f = fopen("input.csv", "rb+");
  if (f) {
    FILE* o = fopen("output.csv", "w+");
    operateOnFiles(f,o);
    fclose(o);
    fclose(f);
  }
  return 0;
}