Compilare: user.cpp: In function ‘int main()’: user.cpp:15:17: warning: unused variable ‘xx’ [-Wunused-variable] int n,m,i,j,xx,yy,x,y,q,e,r,w; ^ user.cpp:15:20: warning: unused variable ‘yy’ [-Wunused-variable] int n,m,i,j,xx,yy,x,y,q,e,r,w; ^ user.cpp:15:23: warning: unused variable ‘x’ [-Wunused-variable] int n,m,i,j,xx,yy,x,y,q,e,r,w; ^ user.cpp:15:25: warning: unused variable ‘y’ [-Wunused-variable] int n,m,i,j,xx,yy,x,y,q,e,r,w; ^ user.cpp:15:31: warning: unused variable ‘r’ [-Wunused-variable] int n,m,i,j,xx,yy,x,y,q,e,r,w; ^ user.cpp:20:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:21:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n"); ^ user.cpp:26:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&t); ^ user.cpp:48:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&t); ^ user.cpp:79:26: warning: ‘startb’ may be used uninitialized in this function [-Wmaybe-uninitialized] b[starta][startb] = 0; ^ user.cpp:79:26: warning: ‘starta’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:52:26: warning: ‘starty’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[startx][starty] = 0; ^ user.cpp:52:26: warning: ‘startx’ may be used uninitialized in this function [-Wmaybe-uninitialized]