Compilare: main.cpp: In function 'int main()': main.cpp:24:14: warning: 'x1' may be used uninitialized [-Wmaybe-uninitialized] 24 | a += (x1 * y_start) - (x_start * y1); | ~~~~^~~~~~~~~~ main.cpp:13:26: note: 'x1' was declared here 13 | long double a = 0.0, x1, y1, x2, y2, x_start, y_start; | ^~