【gdb】打印数组的索引下标

打印数组的索引下标

1. 例子

#include <stdio.h>

int num[10] = { 
  1 << 0,
  1 << 1,
  1 << 2,
  1 << 3,
  1 << 4,
  1 << 5,
  1 << 6,
  1 << 7,
  1 << 8,
  1 << 9
};

int main (void)
{
  int i;

  for (i = 0; i < 10; i++)
    printf ("num[%d] = %d\n", i, num[i]);

  return 0;
}

在gdb中，当打印一个数组时，缺省是不打印索引下标的：

(gdb) p num
$1 = {1, 2, 4, 8, 16, 32, 64, 128, 256, 512}

如果要打印索引下标，则可以通过如下命令进行设置：

(gdb) set print array-indexes on

(gdb) p num
$2 = {[0] = 1, [1] = 2, [2] = 4, [3] = 8, [4] = 16, [5] = 32, [6] = 64, [7] = 128, [8] = 256, [9] = 512}

参考资料

1. gdb手册

2. 打印数组的索引下标https://sourceware.org/gdb/current/onlinedocs/gdb.html/Print-Settings.html#index-set-print