用C语言编程求矩形面积和周长的对角线
#包含“stdio.h”
//面积
double area(double len,double wid){ return len * wid;}
//周长
双圆(double len,double wid){ return 2 *(len+wid);}
//对角线
double duijaoxian(double len,double wid){ return sqrt(len * len+wid * wid);}
void main()
{
Printf("请输入长度和宽度:\ n ");
双倍长度、宽度;
scanf("%f%f ",& amp长度& amp宽度);
Printf ("area: \n ",面积(长度,宽度));
Printf("圆周:\n ",圆(长,宽));
Printf("对角线长度:\n ",对角线(长度,宽度));
}