C语言:在主函数中输入x,y,调用函数求出X,y的和,差,商,积,并在主函数中...答:int a,int b){ return a*b;} float divi(int a,int b){ return 1.0*a/b;} void main(){ int x,y;scanf("%d%d",&x,&y);printf("x+y=%d\n",add(x,y));printf("x-y=%d\n",sub(x,y));printf("x*y=%d\n",mul(x,y));printf("x/y=%f\n",divi(x,y));} ...