vc中 scanf("%f",&f); 编译正确，运行出现debug error！！！

[bluehawaii]

#include<stdio.h>

main()
{
float f;
scanf("%f",&f);
}
就这么简单，但是在vc中就出错
debug error
runtime error

但是f事先初始化以下就没有问题了 ，如f=0;
请问原因

[qinxiaolin]

是浮点数库链接的问题吧,改成double 在我的机器上没问题了!`
jixingzhong(瞌睡虫（既然选择了远方,那就只有风雨兼程了！！）)说的
scanf 前面提供一个 浮点操作就可以了..的方法 也可以

[snowbirdfly]

#include<stdio.h>

main()
{
float f;
scanf("%f",&f);
}
不对啊~
我在VC下面运行怎么没有错误~
搞笑~
是不是你的编译器有问题~~

[snowbirdfly]

对了~
我在Dev C++调试也没有错误~

[lxk_cool]

楼上的,奇怪,我也vc6下调试,编译没错,运行是出现runtime error,初始化后就没事了,或类型改成double

[widowss]

vc下输入数据后报错,gcc编译并执行,没有报错

[bluehawaii]

难道没有人知道么

[xiaocai0001]

浮点数库链接的问题

[junguo]

在使用scanf得到float前，必须出现过float变量的值！

C Run-Time Error R6002
floating-point support not loaded
The necessary floating-point library was not linked.

Possible causes
The program was compiled or linked with an option, such as /FPi87, that requires a coprocessor, but the program was run on a machine that did not have a coprocessor installed.
A format string for a printf or scanf function contained a floating-point format specification and the program did not contain any floating-point values or variables.
The compiler minimizes a program's size by loading floating-point support only when necessary. The compiler cannot detect floating-point format specifications in format strings, so it does not load the necessary floating-point routines.
Use a floating-point argument to correspond to the floating-point format specification, or perform a floating-point assignment elsewhere in the program. This causes floating-point support to be loaded.
In a mixed-language program, a C library was specified before a FORTRAN library when the program was linked. Relink and specify the C library last.

[jixingzhong]

浮点数据的支持问题，只要在 scanf 前面提供一个 浮点操作就可以了 ...

[zhouhuahai]

这个问题偶也遇到过,把f改成double就可以了.

[bugebear3]

改成double,还是要出错.必须要初始化先

[dadi0189]

那就晕了，如果这样的话，干脆我们定义这个变量的时候都初始化一个数。
这世界就是这样烦。

[lujun-cc]

呵呵，我的也没有问题啊！

是不是和编译器的配置选项有关！

[zyfire88]

我在VC++下没问题啊