Compilare: user.cpp:92:2: warning: no newline at end of file user.cpp: In function 'int solve1()': user.cpp:21: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int solve2()': user.cpp:51: warning: format '%c' expects type 'char*', but argument 2 has type 'int' user.cpp:54: warning: format '%c' expects type 'char*', but argument 2 has type 'int' user.cpp:51: warning: 'c' is used uninitialized in this function