Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:22:21: error: invalid conversion from ‘char’ to ‘const char*’ [-fpermissive] for(i=0;i<strlen(*a);i++) ^ In file included from user.cpp:1:0: /usr/include/string.h:397:15: error: initializing argument 1 of ‘size_t strlen(const char*)’ [-fpermissive] extern size_t strlen (__const char *__s) ^ user.cpp:22:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(*a);i++) ^