Compilare: main.cpp: In function 'int main()': main.cpp:141:36: warning: 'x_start' may be used uninitialized [-Wmaybe-uninitialized] 141 | while ( x[st.top()] != x_start || y[st.top()] != y_start ) | ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:92:37: note: 'x_start' was declared here 92 | double x_min=0, y_min,y_start=0,x_start; | ^~~~~~~ main.cpp:116:14: warning: 'y_min' may be used uninitialized [-Wmaybe-uninitialized] 116 | quicksort(x,y,0,n-1,x_min,y_min); | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:92:21: note: 'y_min' was declared here 92 | double x_min=0, y_min,y_start=0,x_start; | ^~~~~