int main()
{
int a, b, c, d, tmp
if(a < b){
tmp = a, a = b, b =tmp
}
if(a < c){
tmp = a, a = c, c =tmp
}
if(a < d){
tmp = a, a = d, d =tmp
}
if(b < c){
tmp = b, b = c, c =tmp
}
if(b < d){
tmp = b, b = d, d =tmp
}
if(c < d){
tmp = c, c = d, d =tmp
}
printf("按照从小到大：%d %d %d %d", a, b, c, d)
return 0
}
好理解一点的就定义个变量来存#include<iostream>
using namespace std
int main()
{
int t,a,b
cin>>a>>b
t=a
a=b
b=t
直接用swap就可以交换 很简单头文件iostream//swap(a,b)
cout<<a<<endl<<b
}
main(){
float a,b,c
printf("input a b c:\n")
scanf("%f%f%f",&a,&b,&c)
printf("(-b+4ac)/2a=%f\n",(4*a*c-b)/(2*a))
}
