Compilare: user.cpp: In function ‘int main()’: user.cpp:34:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<=strlen(s)-1;i++) ^ user.cpp:37:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=i+1;j<=strlen(s)-1;j++) ^ user.cpp:44:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<=strlen(s)-1;i++) ^ user.cpp:46:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=poz+1;i<=strlen(s)-1;i++) ^ user.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<=strlen(s)-1;i++) ^ user.cpp:55:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<=strlen(s)-1;i++) ^