C语句while(scanf("%d%d",&x,&y)==2&&(x!=0||y!

C语句while(scanf("%d%d",&x,&y)==2&&(x!=0||y!
C语句while(scanf("%d%d",&x,&y)==2&&(x!=0||y!

C语句while(scanf("%d%d",&x,&y)==2&&(x!=0||y!
scanf的返回值由后面的参数决定
scanf("%d%d",&a,&b);
如果a和b都被成功读入,那么scanf的返回值就是2
如果只有a被成功读入,返回值为1
如果a和b都未被成功读入,返回值为0
如果遇到错误或遇到end of file,返回值为EOF.
且返回值为int型.
&&(x!=0||y!=0)表示x,y都不为0