Compilare: user.cpp: In function 'void calc(int, int)': user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:129: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[172]' user.cpp:134: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[12]' user.cpp:140: warning: comparison between signed and unsigned integer expressions