Compilare: main.cpp: In function 'int main()': main.cpp:38:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &N, &M, &X, &Y); ^ main.cpp:43:50: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &Map[line][column]); ^ main.cpp:87:12: warning: 'maxZone' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d %d", maxZone + 1, maxSum, maxLength); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~