Compilare: user.cpp: In function ‘int main()’: user.cpp:72:18: warning: unused variable ‘j’ [-Wunused-variable] int n, k, i, j, banane=0; ^ user.cpp:69:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "banana.in", "r", stdin ); ^ user.cpp:70:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "banana.out", "w", stdout ); ^ user.cpp:74:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &n, &k ); ^ user.cpp:77:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &bananier[i].x, &bananier[i].y ); ^