Compilare: main.cpp: In function 'std::vector<std::vector<bool> > read_gates(FILE*, int)': main.cpp:20:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp_in, "%s", buffer); ^ main.cpp: In function 'int eval_input(int, std::vector<std::vector<bool> >&, FILE*)': main.cpp:43:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp_in, "%s", buffer); ^ main.cpp: In function 'int main(int, char**)': main.cpp:110:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp_in, "%d%d", &task, &n); ^ main.cpp:115:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp_in, "%d", &k); ^ main.cpp:121:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp_in, "%d", &result); ^