学步园

#include <stdio.h>

int main()
{
    //实现幂函数 
    double power(double x, double y);
    
    printf("%f\n", power(2.0, 3.0));
    
    //开跟号
    double ssqrt(double x);
    printf("%f\n", ssqrt(64.0));
    
    
    //统计输入的数字、空白符(空格、制表符、回车符)以及所有其他字符出现的次数 
    // F6 或者 Ctrl+Z  
    
    char c;
    int numCount, blankCount,otherCount;
    
    numCount = blankCount = otherCount = 0;
    
    while((c = getchar()) != EOF)
    {
        if(c >= '0' && c <= '9')
        {
            numCount++;
        }
        else if(c == '\t' || c == ' ' || c == '\n')
        {
            blankCount++;
        }
        else
        {
            otherCount++;
        }
    
    }
    
    printf("数字有%d个，空白符有%d个，其他字符有%d个", numCount, blankCount, otherCount);
    
}


double ssqrt(double x)
{
    int i;
    double temp, result;
    
    for(i = 0; i < x ; i++)
    {
        temp = i * i;
        if(temp == x)
        {
            result = i;
            break;
        }
    }
    
    return result;
}

double power(double x, double y)
{
    int i;
    double result;
    
    result = 1;
    
    for(i = 0; i < y / 2.0; i++)
    {
        result *= x;
    }
    
    return result;
    
}