Compilare: user.cpp: In function ‘int main()’: user.cpp:21:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < strlen(P); ++i) { ^ user.cpp:36:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(T); ++i) { ^ user.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == strlen(P)) { ^