float calculateSD(float data[]);

int main()
{
int i;
float data[10];

printf("输入10个元素: ");
for(i=0; i < 10; ++i)
scanf("%f", &data[i]);

printf("\n标准偏差 = %.6f", calculateSD(data));

return 0;
}

float calculateSD(float data[])
{
float sum = 0.0, mean, standardDeviation = 0.0;

int i;

for(i=0; i<10; ++i)
{
sum += data[i];
}

mean = sum/10;

for(i=0; i<10; ++i)
standardDeviation += pow(data[i] – mean, 2);

return sqrt(standardDeviation/10);
}