Compilare: main.cpp: In function 'int main()': main.cpp:49:12: warning: comparison of constant '-1' with boolean expression is always false [-Wbool-compare] if (ok == -1) ~~~^~~~~ main.cpp:28:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &k); ^ main.cpp:30:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i].nr); ^