各类变量即“age，height”等，未经定义就直接赋值，计算机无法理解并执行命令

#include<cstdio>

int main()

{

int age =15;

int height = 162;

float weight =82.5;

char isfat = 'y'

printf("年龄：%d\n",age);

printf("身高：%d\n",height);

printf("体重：%f\n",weight);

printf("是否属于肥胖儿童：%c\n",isfat);

return 0

}

#include <stdio.h>

int main()

{

    int age,height;

    float weight = 82.5;

    char isfat = 'y';

    age = 15;

    height = 162;

    printf("年龄：%d 岁\n", age);

    printf("身高：%d CM\n", height);

    printf("体重：%f KG\n", weight);

    printf("是否属于肥胖儿童：%c\n", isfat); 

    /*%d,%f,%c此类符号在后面会有讲解*/

    return 0;    

}