Compilare: user.cpp: In function ‘int main()’: user.cpp:15:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(b)-strlen(a)+1;i++) { ^ user.cpp:16:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=i;j<=i+strlen(a)-1;j++) { ^ user.cpp:23:9: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (k==0) { ^