C中的pow功能有问题 [英] Problem with the pow function in C

问题描述

我在程序中遇到了pow功能的问题。该函数是for循环的一部分，这里是代码部分：



for（year = 1; year< = 10; ++ year）
{

金额=本金*粉末（1.0 +税率，年份）;

printf（％4u％21.2f \ n，年份，金额）;

}



当我运行程序时，我收到以下错误消息：



/tmp/cc9xIlqs.o：在函数'main'中：

main.c :(。text + 0x84）：未定义引用'pow'

collect2：错误：ld返回1退出状态



任何人都可以提供帮助吗？

解决方案

尝试将-lm开关添加到gcc命令以加载数学库：

 gcc MyProgram.c -o MyProgram -lm 

感谢。我的字体使得该建议看起来像1号而不是小写字母l。在我连接之前，我花了几次尝试。谢谢你的帮助。

I am running into a problem with the pow function in my program. The function is part of a for loop and here is the code section:

for( year = 1; year <= 10; ++year)
{
amount = principal * pow( 1.0 + rate, year);
printf( "%4u%21.2f\n", year, amount);
}

When I run my program I get the following error message:

/tmp/cc9xIlqs.o: In function 'main':
main.c: (.text+0x84): undefined reference to 'pow'
collect2: error: ld returned 1 exit status

Can anyone provide help with this?

解决方案

Try adding the -lm switch to your gcc command to load the math library:

gcc MyProgram.c -o MyProgram -lm

Thanks. My fonts have made that suggestion look like a number 1 instead of a lower case l. It took me a few tries before I even made the connection. Thanks for the help.

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