Compilare: main.cpp: In function 'bool add(n_t*, char*)': main.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'bool eliminate(n_t*, char*)': main.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:203:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(word); ++j) { ~~^~~~~~~~~~~~~~ main.cpp:211:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(word); ++j) { ~~^~~~~~~~~~~~~~ main.cpp:226:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(word); ++j) { ~~^~~~~~~~~~~~~~ main.cpp:240:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(word); ++j) { ~~^~~~~~~~~~~~~~