Question

C语言问题—输出double型数据

#include<stdio.h>main(){ double a,b,sum; printf("please press two numbers:\n"); scanf("%f%f",&a,&b); sum=a+b; printf("The sum of %f + %f is %f\n",a,b,sum); return 0;}
当我执行时，输出情况为：但是我将double改为float后 输出结果正确 为啥咧。。。

Answer 1

double类型的话
scanf("%f%f",&a,&b); 改为 scanf("%lf%lf",&a,&b);
printf("The sum of %f + %f is %f\n",a,b,sum); 改为printf("The sum of %lf + %lf is %lf\n",a,b,sum);

Answer 2

scanf("%lf%lf",&a,&b);
这样也会正常的
%f 对应float
%lf 对应 double

Answer 3

main()怎么没有返回值类型呢、 加个int 或者viod试试吧！！