//program 5.6 know your hat size-if you dare...
#include<stdio.h>

int main(void)
{
    char size[3][12]={
        {'6','6','6','6','7','7','7','7','7','7','7','7'},
        {'1','5','3','7',' ','1','1','3','1','5','3','7'},
        {'2','8','4','8',' ','8','4','8','2','8','4','8'}
    };

    int head_size[12]=
    {164,166,169,172,175,178,181,184,188,191,194,197};

    float cranium=0.0f;
    int your_head=0;
    bool hat_found=false;

    //get the circumference of the head
    printf("\nenter the circumference of your head above your eyebrows"
        "in inches as a decimal value:");
    scanf(" %f",&cranium);

    your_head=(int)(8.0f*cranium);

    size_t i=0;
    if(your_head==head_size[i])
        hat_found=true;
    else
    {
        for(i=1;i<sizeof(head_size);++i)
        {
            //find head size in the headsize array
            if(your_head>head_size[i-1]&&your_head<=head_size[i])
            {
                hat_found=true;
                break;
            }
        }
    }

    if(hat_found)
    {
        printf("\nyour hat size is %c %c%c%c\n",size[0][i],size[1][i],(size[1][i]==' ')?' ':'/',size[2][i]);
    }
    else
    {
        if(your_head < head_size[0])
            printf("\nyou are the proverbial pinhead.no hat for you I'm afraid.\n");
        else
            printf("\nyou,in technical parlance,are a fathead.no hat for you,I'm afraid.\n");
    }
    return 0;
}   输入范围以外的数，不显示所要显示的内容。 用的v c++6.0，输入 #include<stdbool.h> 不支持？if(hat_found) 读不出 bool hat_found=false;

那我用什么编程软件来编写它