Compilare: user.cpp: In function ‘void BFS(int, int)’: user.cpp:44:37: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(Mat[x+dx[i]][y+dy[i]]!=1&d[x][y]+1<d[x+dx[i]][y+dy[i]]&&x+dx[i]<=N&&y+dy[i]>0&&y+dy[i]<=M) ^ user.cpp: In function ‘int main()’: user.cpp:65:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d%d%d",&T,&N,&M,&CX,&CY,&K); ^ user.cpp:69:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d",&X,&Y,&D); ^ user.cpp:85:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&G); ^ user.cpp:91:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d",&X1,&Y1,&X2,&Y2); ^ user.cpp:101:20: warning: ‘B’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(T==1)fprintf(OUT,"%d %d %d",A,B,d[A][B]); ^ user.cpp:101:20: warning: ‘A’ may be used uninitialized in this function [-Wmaybe-uninitialized]