c语言基本运算训练

1.求三角形面积
#include#includeint main(){ double a,b,c,s,area; a=3.67; b=5.43; c=6.21; s=(a+b+c)/2; area=sqrt(s*(s-a)*(s-b)*(s-c)); printf("a=%f\tb=%f\tc=%f\t"); printf("area=%f\n"); return 0; } 运行结果
【c语言基本运算训练】a=0.000000b=0.000000c=-1.#QNAN0area=0.000000--------------------------------Process exited after 0.0094 seconds with return value 0请按任意键继续. . . 2.输入球半径，求球体积
#include#include#define PI 3.14int main(){ float r,v; printf("请输入半径r："); scanf("%f",&r); v=4*PI*pow(r,3)/3; printf("%f",v); return 0;} 运行结果
请输入半径r：3113.040001--------------------------------Process exited after 3.564 seconds with return value 0请按任意键继续. . . 3.字母的大写转小写
#includeint main(){ char c1,c2; c1='A'; c2=c1+32; printf("%c,%c\n",c1,c2); printf("%d,%d\n",c1,c2); return 0; } 运行结果
A,a65,97--------------------------------Process exited after 0.01597 seconds with return value 0请按任意键继续. . .