Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19:5: error: expected initializer before ‘for’ for(int i = 1; i <= n; i++) ^ user.cpp:19:20: error: ‘i’ was not declared in this scope for(int i = 1; i <= n; i++) ^ user.cpp:19:31: error: expected ‘;’ before ‘)’ token for(int i = 1; i <= n; i++) ^ user.cpp:21:5: error: ‘pct’ was not declared in this scope pct[n+1].x = pct[1].x; ^ user.cpp:15:24: warning: unused variable ‘b’ [-Wunused-variable] long double a = 0, b = 0; ^