Compilare: main.cpp: In function 'int main()': main.cpp:10:35: 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); ^ main.cpp:11:37: 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); ^ main.cpp:13:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:16:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ main.cpp:19:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&mat[i][j]); ^ main.cpp:50:26: warning: 'yi' may be used uninitialized in this function [-Wmaybe-uninitialized] dd[xi][yi]=ars[xi][yi]; ~~~~~~~~~~^ main.cpp:50:26: warning: 'xi' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:70:17: warning: 'yf' may be used uninitialized in this function [-Wmaybe-uninitialized] if(dd[xf][yf]==0) ~~~~~~~~~^ main.cpp:70:17: warning: 'xf' may be used uninitialized in this function [-Wmaybe-uninitialized]