c语言高手这为什么不能运行？？

#include<math.h>

main()
{
int tall,weight,normal,fat,thin;
printf("please input tall and weight:");
scanf("%f%f",&tall,&weight);
normal==tall-110;
if(normal-5<=weight<=normal+5)
printf("%s\n","normal");
else if(weight>normal+5)
printf("%s\n","fat");
else if(weight<normal-5)
printf("%s\n","thin");
}

这是修改后的，在DEV-C++通过检测

main()
{
int tall,weight,normal,fat,thin;
printf("please input tall and weight:");
scanf("%d,%d",&tall,&weight);
normal=tall-110;
if(normal-5<=weight&&weight<=normal+5)
printf("%s\n","normal");
else if(weight>normal+5)
printf("%s\n","fat");
else if(weight<normal-5)
printf("%s\n","thin");
}

#include<stdio.h>////你/这也没有头文件 #include<math.h>

main() { int tall,weight,normal;/////这多余 printf("please input tall and weight:"); do{ scanf("%d %d",&tall,&weight);/////这错了，输入数值之间应有分隔符 }while(tall < 110);////这必须tall比110大 normal=tall-110;/////这也错了，多了一个等号 if(normal-5<=weight && weight<=normal+5) printf("%s\n","normal"); else if(weight>normal+5) printf("%s\n","fat"); else if(weight<normal-5) printf("%s\n","thin"); } 不明白的话 加我870662874嘻嘻

normal==tall-110; 多了一个等号

scanf("%f%f",&tall,&weight); 这两个是整形的吧

normal-5<=weight<=normal+5不能这么写

normal-5<=weight&&weight<=normal+5;

#include <stdio.h> #include <math.h> main() { int tall,weight,normal,fat,thin; printf("please input tall and weight:"); scanf("%d%d",&tall,&weight); normal==tall-110; if(normal-5<=weight && weight<=normal+5) printf("%s\n","normal"); else if(weight>normal+5) printf("%s\n","fat"); else if(weight<normal-5) printf("%s\n","thin"); }