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1、第一次作业一、试验目的:熟悉scanf,float输入法,能编写简单程序。二、实验内容:1、程序代码:#include#includeintmain(){doublea,b,c,s,area;printf("请输入三角形三边长:");scanf("%lf,%lf,%lf",&a,&b,&c);s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c));printf("a=%lf,b=%lf,c=%lf",a,b,c);printf("area
2、=%lf",area);return0;}2、#include#includeintmain(){floata,b,c,t;printf("请输入三个整形数:");scanf("%f,%f,%f",&a,&b,&c);t=a;a=b;b=c;c=t;printf("a=%f,b=%f,c=%f",a,b,c);return0;}3、#include#includeintmain(){doublea,c;printf("请输入华氏温
3、度:");scanf("%lf",&a);c=5.0/9*(a-32);printf("摄氏温度=%lf",c);return0;}4、#include#includeintmain(){doubler,h,l,s,x,v1,v2;printf("请输入圆半径r和请输入圆柱高h:");scanf("%lf,%lf",&r,&h);l=(2*3.14)*r;s=3.14*pow(r,2);x=4*3.14*pow(r,2);v1=(4/3)*3.14*pow(r,3
4、);v2=s*h;printf("圆周长l=%.2lf,圆面积s=%.2lf,圆球表面积x=%.2lf,圆球体积v1=%.2lf,圆柱体积v2=%.2lf",l,s,x,v1,v2);return0;}