运行成功，输入错在哪里？
#include <stdio.h>
int main()
{
char c = 'a';
int n = c ; //将c赋值给n
float f = n; //将c赋值给f
double d =f;//将c赋值给d
printf("%d\n",n);
printf("%f\n",f);
printf("%f\n",d);
return 0;
}
