Compilare: user.cpp: In function ‘int main()’: user.cpp:20:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(str); j++) ^ user.cpp:34:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (strlen(str) < m) ^ user.cpp:40:14: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] Q[1].x=x1; ^ user.cpp:41:14: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] Q[1].y=y1; ^ user.cpp:130:14: warning: ‘y2’ may be used uninitialized in this function [-Wmaybe-uninitialized] Q[1].y=y2; ^ user.cpp:129:14: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] Q[1].x=x2; ^ user.cpp:220:35: warning: ‘cc’ may be used uninitialized in this function [-Wmaybe-uninitialized] w<< mini <<' '<<l<<' '<<cc; ^ user.cpp:220:25: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] w<< mini <<' '<<l<<' '<<cc; ^