C语言迭代法程序求助ΔL/L=-3*10^（-4）+8*10^（-6）*（T-273）+2*10^（-9）*（T-273

C语言迭代法程序求助
ΔL/L=-3*10^（-4）+8*10^（-6）*（T-273）+2*10^（-9）*（T-273）^2.其中L是和T相关的变量.设定T=273时ΔL=0,此时ΔL/L代表它的固有属性.求T从273开始每增加50时ΔL/L的值.

/>#include <stdio.h>

#define result(T) (((-3) * 0.0001) + (8 * 0.000001 * (T - 273)) + (2 * 0.000000001 * (T - 273) * (T - 273)))

int main(void)
{
int T = 273;
int count = 0;
int i = 0;
double ret = 0.0;

printf("Please input iteration count ! \n");
scanf("%d", &count);

for(i = 0; i < count; i++)
{
ret = result(T);
T += 50;
printf("ret is [%lf] \n", ret);
}

return 0;
}运行结果

Please input iteration count ! 10ret is [-0.000300] ret is [0.000105] ret is [0.000520] ret is [0.000945] ret is [0.001380] ret is [0.001825] ret is [0.002280] ret is [0.002745] ret is [0.003220] ret is [0.003705]