//intmain() //{ //intn,m; //printf("请输入一个数字:\n"); //scanf("%d",&n); //if(n<1) // m=n; //elseif(n>=1&&n<10) // m=2n-1; //   else // m=3n-11; // printf("y=%d",m); //return0; //} //计算小于1000的数的整数平方根 //include<stdio.h> //include<math.h&gt...