Compilare: user.cpp: In function ‘int Test(int, int)’: user.cpp:17:28: warning: NULL used in arithmetic [-Wpointer-arith] for (int k=0; a[j][k]!=NULL; k++) ^ user.cpp: In function ‘void Solve1()’: user.cpp:35:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[5001]’ [-Wformat=] fscanf(f,"%s",&a[i]); ^ user.cpp:36:34: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] nn=strlen(a[i]); a[i][nn]=NULL; nn--; ^ user.cpp: In function ‘void Solve2()’: user.cpp:53:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[5001]’ [-Wformat=] fscanf(f,"%s",&a[i]); ^ user.cpp: In function ‘void Solve1()’: user.cpp:32:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&nr_prop); max=0; ^ user.cpp:35:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a[i]); ^ user.cpp: In function ‘void Solve2()’: user.cpp:50:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&nr_prop); ^ user.cpp:53:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a[i]); ^ user.cpp: In function ‘void Read()’: user.cpp:79:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&p); ^