Compilare: user.cpp: In function ‘int main()’: user.cpp:78:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d\n",&n,&m); ^ user.cpp:81:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&ch); ^ user.cpp:84:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"\n"); ^ user.cpp:161:18: warning: ‘yf’ may be used uninitialized in this function [-Wmaybe-uninitialized] val=nr[xf][yf]; ^ user.cpp:161:18: warning: ‘xf’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:163:17: warning: ‘yi’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr[xi][yi]=0; ^ user.cpp:163:17: warning: ‘xi’ may be used uninitialized in this function [-Wmaybe-uninitialized]