Compilare: user.cpp: In function ‘int main()’: user.cpp:23:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("parc.in","r",stdin); ^ user.cpp:24:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("parc.out","w",stdout); ^ user.cpp:27:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&xpa,&ypa); ^ user.cpp:28:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&xg,&yg,&xp,&yp); ^ user.cpp:29:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:32:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v1[i].st,&v1[i].dr); ^ user.cpp:35:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:38:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v2[i].st,&v2[i].dr); ^ user.cpp:65:12: warning: ‘r2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int l2,r2; ^ user.cpp:80:18: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=l2+1;i<r2;i++) {pozy++;sumy[pozy]=sumy[pozy-1]+v2[i].st-v2[i-1].dr;} ^ user.cpp:57:12: warning: ‘r1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int l1,r1; ^ user.cpp:57:9: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int l1,r1; ^