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:37:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:43:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:50:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:56:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:69:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:75:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:82:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y); j++) ~~^~~~~~~~~~~ main.cpp:88:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y); j++) ~~^~~~~~~~~~~