Compilare: main.cpp: In function 'void fillia(int, int)': main.cpp:22:15: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] b[x][y] = NULL; ^~~~ main.cpp:26:43: warning: NULL used in arithmetic [-Wpointer-arith] if(b[x+dirLin[k]][y+dirCol[k]] != NULL and b[x+dirLin[k]][y+dirCol[k]] == a[x][y]) ^~~~ main.cpp: In function 'int main()': main.cpp:45:31: warning: NULL used in arithmetic [-Wpointer-arith] if(b[i][j] != NULL) ^~~~ main.cpp:32:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &cerinta); ^ main.cpp:33:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d\n", &n,&m); ^ main.cpp:37:32: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(a[i]+1, m+2, fin); ^