编译时出现cos（）错误 [英] cos() error when compiling

问题描述

每次我尝试编译此代码时都会收到此错误：



未定义引用`cos''

collect2：ld返回1退出状态



我不明白什么是错的。有人可以解释为什么继续得到这个错误，即使我有< math.h>>？

Every time I try to compile this code I get this error:

undefined reference to `cos''
collect2: ld returned 1 exit status

I don''t understand what''s wrong. Can someone please explain why keep getting this error even though I have <math.h>>?

#include <stdio.h>
#include <math.h>

int main (){
  double range, value;
  int count,offset, sp;

  printf("For loop example - simple cosine graph\n\n");

  range = 0.0;
  for(count = 1; range <= 40; count++){

    value = cos (range); //caldulate value

//convert decimal value into interger to use
//as number of blanks to display

offset = (value + 1.0) * 15.0;

//display the indicated number of blanks

for (sp=0; sp < offset; sp++)
printf(" ");

//display the mrker for the graph

printf("*\n");

range += 0.5;
}

return 0;

}

推荐答案

你应该与数学库联系，例如

You should link with the math library, e.g.

gcc myapp.c -o myapp -lm

文档 [ ^ ]州： 链接-lm 。

The documentation[^] states: "Link with -lm".

这篇关于编译时出现cos（）错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！