C中未聲明的標識符

Question

我一直在嘗試編譯使用PCL的程序。 但是，我不斷收到此錯誤：

test.c:23: error: ‘PCL_CNT_TYPE’ undeclared (first use in this function)
test.c:23: error: (Each undeclared identifier is reported only once
test.c:23: error: for each function it appears in.)
test.c:23: error: expected ‘;’ before ‘i_result_list1’
test.c:24: error: ‘PCL_FP_CNT_TYPE’ undeclared (first use in this function)
test.c:24: error: expected ‘;’ before ‘fp_result_list1’
test.c:27: error: ‘PCL_L1DCACHE_MISS’ undeclared (first use in this function)
test.c:28: error: ‘PCL_L2CACHE_MISS’ undeclared (first use in this function)
test.c:30: error: ‘PCL_MODE_USER’ undeclared (first use in this function)
test.c:33: error: ‘PCL_SUCCESS’ undeclared (first use in this function)
test.c:47: error: ‘i_result_list2’ undeclared (first use in this function)
test.c:47: error: ‘fp_result_list2’ undeclared (first use in this function)

有什么想法嗎？

我的機器上安裝了libpcl1 {-dev}，所以我想知道要使此功能有效還需要什么。

如果您需要進一步的信息，請告訴我。

謝謝。

Answer 1

放：

#include <pcl.h>

在文件的頂部。 鏈接時，您還將需要-lpcl 。 例如：

gcc program.c -lpcl -o program