Compilare: main.cpp: In function 'int main()': main.cpp:22:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2; i<=strlen(a+1); i++) ~^~~~~~~~~~~~~ main.cpp:33:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=strlen(b+1); i++) ~^~~~~~~~~~~~~ main.cpp:40:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==strlen(a+1)) ~^~~~~~~~~~~~~