Compilare: user.cpp: In function ‘int main()’: user.cpp:75:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<n.size(); i++) ^ user.cpp:81:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<c.size(); i++) ^ user.cpp: In function ‘void MULTIPLY(int*)’: user.cpp:16:15: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i, j, l, t=0;; ^ user.cpp: In function ‘void SUBSTRACT(int*)’: user.cpp:55:11: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] N[0]=l; ^