Compilare: user.cpp: In function ‘int main()’: user.cpp:54:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in","r",stdin); ^ user.cpp:55:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ user.cpp:59:23: 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:61:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=N;++i) scanf("%s",a[i]+1); ^ user.cpp:149:30: warning: ‘FY’ may be used uninitialized in this function [-Wmaybe-uninitialized] else printf("%d\n",g[FX][FY]); ^ user.cpp:149:30: warning: ‘FX’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:118:40: warning: ‘SY’ may be used uninitialized in this function [-Wmaybe-uninitialized] viz[SX][SY] = 1; g[SX][SY] = d[SX][SY]; ^ user.cpp:118:40: warning: ‘SX’ may be used uninitialized in this function [-Wmaybe-uninitialized]