int x=6; x += x -= x * x; printf("x = %d\n",x);

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intx=6;x+=x-=x*x;printf("x=%d\n",x);intx=6;x+=x-=x*x;printf("x=%d\n",x);intx=6;x+=x-=x*x;printf("x=%

int x=6; x += x -= x * x; printf("x = %d\n",x);
int x=6; x += x -= x * x; printf("x = %d\n",x);

int x=6; x += x -= x * x; printf("x = %d\n",x);
int x=6;
x +=( x -= x * x);
等价于：
x=(x+=(6-(6*6)))=(x+=-30)=-60;