Compilare: main.cpp: In function 'int main()': main.cpp:40:6: warning: unused variable 'n' [-Wunused-variable] int n, k; ^ main.cpp:40:9: warning: unused variable 'k' [-Wunused-variable] int n, k; ^ main.cpp:37:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("triangles.in", "r", stdin); ^ main.cpp:38:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("triangles.out", "w", stdout); ^