Compilare: user.cpp: In function ‘int main()’: user.cpp:30:10: warning: statement has no effect [-Wunused-value] for(i; i < L; i++){ ^ user.cpp:13:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, l, L, prim = 1, p = 0; ^ user.cpp:15:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", s); ^ user.cpp:16:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.cpp:17:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", s2); ^