Compilare: main.cpp: In function 'int main()': main.cpp:17:16: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] t[0] = NULL; ^~~~ main.cpp:20:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(sir); j++){ ~~^~~~~~~~~~~~~ main.cpp:41:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:47:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:55:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:61:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:78:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:84:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:92:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y); j++) ~~^~~~~~~~~~~ main.cpp:98:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y); j++) ~~^~~~~~~~~~~