main.o(.text+0x1ed): In function `main':
: undefined reference to `avergecolumns'
collect2: ld returned 1 exit status

当我gcc * .o.我不太确定是什么原因导致这个错误.其他海报已解释为功能未找到或功能为空.如果有人可以澄清或改进,那将是非常感谢！

这是我的函数代码(我正在计算2D数组中的列的平均值)：

#include "my.h"

void averagecolumns (int x,int y,int** a)
{
    int i;
    int j;
    float sum;
    float colAvg;

    sum = 0;
    colAvg = 0;

    printf("i.  The column averages are: \n");
    for(i = 0; i < x; i++)
        {
            for(j = 0; j < y; j++)
                {
                    sum += a[i][j];
                    colAvg = sum / (float)x;
                }
            printf("Column: %3d,Average: %6.2f",j,colAvg);
            sum = 0;   
            colAvg = 0;
        }

主要的主要部分有：

#include "my.h"

int main (int argc,char* argv[])
{
     int** a;
     float** colAvg;
     int ROWS;
     int COLS;
     int i;
     int j;
     int** table;
     FILE* fpmyfile;
     int closeResult;

....

             printme (ROWS,COLS,a);                              // call functions a - j
             oddvalues (ROWS,a);
             oddlocations (ROWS,a);
             countoddrows (ROWS,a);
             addrows (ROWS,a);
             findfirstsmall (ROWS,a);
             findlastlarge (ROWS,a);                          
             addcolumns (ROWS,a);
             avergecolumns (ROWS,a);

....

}

此外,这是一个链接器或编译错误(我不知道要添加哪个标签).