Compilare: user.cpp: In function ‘void det_Coef(char*, int&, int&)’: user.cpp:12:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(s);++i) { ^ user.cpp: In function ‘int main()’: user.cpp:33:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(a);++i) ^ user.cpp:27:9: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] { int n,x,p,q,s,t; ^