Eroare de compilare: main.cpp: In function 'int main()': main.cpp:60:28: error: request for member 'x' in 'perechi[(++ nr)]', which is of non-class type 'double' perechi[++ nr].x = (double)(x[i] - x[j]) / (y[i] - y[j]); ^ main.cpp:53:15: warning: unused variable 'a' [-Wunused-variable] long long a, b, sum = 0; ^ main.cpp:53:18: warning: unused variable 'b' [-Wunused-variable] long long a, b, sum = 0; ^ main.cpp:50:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trapez.in", "r", stdin); ^ main.cpp:51:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trapez.out", "w", stdout); ^ main.cpp:54:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:56:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x[i], &y[i]); ^ Non zero exit status: 1