exp03_11.c

《C语言程序设计教程、实验与练习》 源文件下载

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

main()
{
 float a,b,c;
 float s,area;

 printf("please input the length of edges of triangle like this:\n22.5,3,44.6\n");
 scanf("%f,%f,%f",&a,&b,&c);
 s=(a+b+c)/2;
 area=sqrt(s*(s-a)*(s-b)*(s-c));
 printf("a=%-7.2f,b=%-7.2f,c=%-7.2f\n",a,b,c);
 printf("area=%-7.2f\n",area);

 }