Compilare: main.cpp: In function 'int main()': main.cpp:9:13: warning: unused variable 'x' [-Wunused-variable] int n,s,x,k,i,j; ^ main.cpp:10:12: warning: unused variable 'y1' [-Wunused-variable] double y1,y2,y; ^~ main.cpp:10:15: warning: unused variable 'y2' [-Wunused-variable] double y1,y2,y; ^~ main.cpp:10:18: warning: unused variable 'y' [-Wunused-variable] double y1,y2,y; ^