Compilare: main.cpp: In function 'int main()': main.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length(); i++) ~^~~~~~~~~~~~~~~ main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k; i++) ~^~~~~~~~~~~~~~~ main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:76:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:85:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:94:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~ main.cpp:103:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<numar.length() && k && numar[0]; i++) ~^~~~~~~~~~~~~~~