请看下面一段程序: #include main() { int a,b; float x,y; char c1,c2; scanf("a=%d b=%d",&a,&b); scanf("%f %e",&x,&y); scanf(" %c %c",&c1,&c2); printf("a=%d,b=%d,x=%f,y=%f,c1=%c,c2=%c\n",a,b,x,y,c1,c2); } 请问在键盘上如何输入?(曾经在TC上编译通过,在VC++6.0上不知怎么输入?)