Compilare: user.cpp: In function ‘int main()’: user.cpp:55:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &a, &b, &e); ^ user.cpp:57:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &x, &y, &z); ^ user.cpp:104:5: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=0; i<sol; i++){ ^