求C语言习题答案

1.
main()
{int a,b,c,t;
printf("input some num\n");
scanf("%d%d%d,&a,&b,&c");
if(a<b)
{t=a;a=b;b=t;}
if(b<c)
{t=b;b=c;c=t;}
if(a<c)
{t=a;a=c;c=t;}
printf("small to big: %d %d %d\n",a,b,c);
}

2.
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
float a,b,c,delta;
printf("please input a b c :");
scanf("%f",&a);
scanf("%f",&b);
scanf("%f",&c);
if(a==0 && b==0 && c==0)
printf("000\n");
else
{
delta = (float)b*b-4*a*c;
if(delta<0)
printf("111\n");
else
printf("The two roots are %f %f\n",(sqrt((float)delta)-b)/(2*a),(-sqrt((float)delta)-b)/(2*a));
}
}