#include 　　main() 　　{ int x=1,y=0,a=0,b=0; switch(x) { case 1:switch(y#include main(){ int x=1,y=0,a=0,b=0;switch(x){ case 1:switch(y){ case 0:a++; break;case 1:b++; break;}case 2:a++; b++; break;case 3:a++; b++;}printf(“a=%d,b=%d\n”,a,b)