Compilare: user.cpp: In function ‘int main()’: user.cpp:16:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta5.in","r",stdin); ^ user.cpp:17:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta5.out","w",stdout); ^ user.cpp:19:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p); ^ user.cpp:20:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&k); ^ user.cpp:25:70: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&v1[i][1],&v1[i][2],&v1[i][3],&v1[i][4]); ^ user.cpp:40:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&i1,&j1,&i2,&j2); ^ user.cpp:32:68: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((v1[i][3]-v1[i][1]+1<=l1 && v1[i][4]-v1[i][2]+1<=l2)or(v1[i][3]-v1[i][1]+1<=l2 && v1[i][4]-v1[i][2]+1<=l1)) c++; ^ user.cpp:32:95: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((v1[i][3]-v1[i][1]+1<=l1 && v1[i][4]-v1[i][2]+1<=l2)or(v1[i][3]-v1[i][1]+1<=l2 && v1[i][4]-v1[i][2]+1<=l1)) c++; ^