Compilare: main.cpp: In function 'int ok(double)': main.cpp:9:19: warning: unused variable 's' [-Wunused-variable] 9 | int i, j = 1, s = 0; | ^ main.cpp: In function 'int main()': main.cpp:40:15: warning: unused variable 's' [-Wunused-variable] 40 | double x, s = 0., sol; | ^ main.cpp:70:11: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] 70 | printf("%lf", sol); | ~~~~~~^~~~~~~~~~~~