Compilare: user.cpp: In function ‘int main()’: user.cpp:8:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("pascal.in", "r",stdin); ^ user.cpp:9:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pascal.out", "w",stdout); ^ user.cpp:11:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &r, &d); ^ user.cpp:59:10: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr*=2; ^ user.cpp:63:30: warning: ‘x5’ may be used uninitialized in this function [-Wmaybe-uninitialized] x5+=nr3[r-i+1]-nr3[i]; ^ user.cpp:62:30: warning: ‘x3’ may be used uninitialized in this function [-Wmaybe-uninitialized] x3+=nr2[r-i+1]-nr2[i]; ^ user.cpp:61:30: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] x2+=nr1[r-i+1]-nr1[i]; ^