include void 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”, a, b);}程序的运行结果是__。a=2,b=1
若变量已正确定义,有以下程序段i=0;do printf(“%d,”,i); while( i++ );printf(“%d”,i);其输出结果是_。0,1
有以下程序