Question

c程序运行出错

#include<stdio.h>
main()
{char sex,sports,diet,M,F,Y,N; float hf,hm,hc;
printf("\nInput hf,hm,sex,sports,diet=");
scanf("%f%f%c%c%c%c\n",&hf,&hm,&sex,&sports,&diet);
if(sex=='M')
printf("hc=%f\n",(hf+hm)*0.54);
else
printf("hc=%f\n",(hf*0.923+hm)/2);
if(sports=='Y')
printf("hc=%f\n",hc*(1+0.02));
else
if(diet=='Y')
printf("hc=%f\n",hc*(1+0.015));
else
printf("%f\n",hc);
}

Answer 1

#include<stdio.h>
main()
{char sex,sports,diet,M,F,Y,N; float hf,hm,hc;
printf("\nInput hf,hm,sex,sports,diet="); /*此处的提示不妥,输入时各变量间不能用逗号*/
scanf("%f%f%c%c%c",&hf,&hm,&sex,&sports,&diet); /* 多了一个%c和一个\n */
if(sex=='M')
hc=(hf+hm)*0.54; /* 因为下面要输出hc,所以要把它保存到变量中 */
else
hc=(hf*0.923+hm)/2;
printf("hc=%f\n",hc); /* 输出在这里统一进行 */
if(sports=='Y')
printf("hc=%f\n",hc*(1+0.02));
else
if(diet=='Y')
printf("hc=%f\n",hc*(1+0.015));
else
printf("%f\n",hc);
}

Answer 2

%c%c%c：在输入的时候应该直接一并输入，如abc。
如果有数字，字符输入，最好分开二行书写，要不会把前面的回车赋给后面的字符变量。

Answer 3

scanf句子中去掉一个%c吧

追问

还是负值啊