Compilare: user.cpp: In function ‘int main()’: user.cpp:30:9: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(a[i]); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ user.cpp:30:9: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(a[i]); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ user.cpp:30:18: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(a[i]); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ 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("delfin.in","r",stdin); ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("delfin.out","w",stdout); ^ user.cpp:27:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ user.cpp:30:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(a[i]); ^ user.cpp:90:18: warning: ‘yp’ may be used uninitialized in this function [-Wmaybe-uninitialized] ftp[xp][yp]=1; ^ user.cpp:119:17: warning: ‘yc’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(tv[xc][yc]<4000000) ^ user.cpp:58:18: warning: ‘yt’ may be used uninitialized in this function [-Wmaybe-uninitialized] ftv[xt][yt]=1; ^ user.cpp:90:18: warning: ‘xp’ may be used uninitialized in this function [-Wmaybe-uninitialized] ftp[xp][yp]=1; ^ user.cpp:119:17: warning: ‘xc’ may be used uninitialized in this function [-Wmaybe-uninitialized]