下列程序段的运行结果是_____。#definesub(x,y)x-yMain(){inta,b,s;A=5,b=6;S=sub

下列程序段的运行结果是_____。#definesub(x,y)x-yMain(){inta,b,s;A=5,b=6;S=sub(a,b);Printf("s=%d\n",s);}

s=-1