Compilare: main.cpp: In function 'int main()': main.cpp:41:16: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (matrix[i][j] == 0) ^ main.cpp:48:16: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (matrix[i][j] == 0) ^