Compilare: main.cpp: In function 'int main()': main.cpp:17:48: warning: 'y3' may be used uninitialized in this function [-Wmaybe-uninitialized] double det=x1*y2+x2*y3+x3*y1-y1*x2-y2*x3-y3*x1; ~~^~~ main.cpp:26:49: note: 'y3' was declared here int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:17:30: warning: 'x3' may be used uninitialized in this function [-Wmaybe-uninitialized] double det=x1*y2+x2*y3+x3*y1-y1*x2-y2*x3-y3*x1; ~~^~~ main.cpp:26:46: note: 'x3' was declared here int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:17:18: warning: 'y2' may be used uninitialized in this function [-Wmaybe-uninitialized] double det=x1*y2+x2*y3+x3*y1-y1*x2-y2*x3-y3*x1; ~~^~~ main.cpp:26:43: note: 'y2' was declared here int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:26:40: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:17:18: warning: 'y1' may be used uninitialized in this function [-Wmaybe-uninitialized] double det=x1*y2+x2*y3+x3*y1-y1*x2-y2*x3-y3*x1; ~~^~~ main.cpp:26:37: note: 'y1' was declared here int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:17:36: warning: 'x1' may be used uninitialized in this function [-Wmaybe-uninitialized] double det=x1*y2+x2*y3+x3*y1-y1*x2-y2*x3-y3*x1; ~~^~~ main.cpp:26:34: note: 'x1' was declared here int n,i,XI,YI,c=0,maxx=0,ind,x1,y1,x2,y2,x3,y3; ^~ main.cpp:52:9: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized] if(ind!=i) ^~