c语言题把1,2,3,4,5,6,7,8,9组合成三个三位数,要求每个数字仅用一次...答:C语言程序如下:int main(){ char temp[3];for(int i = 123;i<=987;i++){ itoa(i, temp, 10);//转换成string if(temp[0] != temp[1] && temp[0] != temp[2] && temp[1] != temp[2]){ int a = sqrt(i);if(a * a == i){ std::cout << i << std::endl;}...