Compilare: main.cpp: In function 'int main()': main.cpp:18:16: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] t[0] = NULL; ^~~~ main.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(sir); j++){ ~~^~~~~~~~~~~~~ main.cpp:44:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:50:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:58:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:64:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:81:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:87:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:95:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y); j++) ~~^~~~~~~~~~~ main.cpp:101:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y); j++) ~~^~~~~~~~~~~