C语言求三角形面积和周长

胡冰倩2012329620058 计科3班

1实验内容

输入三角形的3条边,a,b,c,如果能构成三角形，输出面积area和周长perimeter（保留两位小数0;否则输出“These sides do not correspond to a valid triangle”.

2实验程序

#include

#include

int main(void)

{

double area,perimeter,s,a,b,c;

printf("Enter a b c:");

scanf("%lf%lf%lf",&a,&b,&c);

if((a+b>c)||(a+c>b)||(b+c>a)){

s=(a+b+c)/2;

area=sqrt(s*(s-a)*(s-b)*(s-c));

perimeter=a+b+c;

printf("area=%.2f,perimeter=%.2f\n",area,perimeter);

}

else{

printf("These sides do not corrspond to a vaild triangle\n");

}

return 0;

}

3实验结果

4实验心得