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:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(sir); j++){ ~~^~~~~~~~~~~~~ main.cpp:43:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:49:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:57:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:63:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(p); j++) ~~^~~~~~~~~~~ main.cpp:80:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:86:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y) - 1; j++) ~~^~~~~~~~~~~~~~~ main.cpp:94:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(y); j++) ~~^~~~~~~~~~~ main.cpp:100:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(y); j++) ~~^~~~~~~~~~~