Compilare: user.cpp: In function ‘int main()’: user.cpp:16:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=2;i<=strlen(a);i++) ^ user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(b)-1;i++) ^ user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q==strlen(a)-1) ^