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# 打印变量的类型和所在文件 ## 例子 #include <stdio.h> struct child { char name[10]; enum { boy, girl } gender; }; struct child he = { "Tom", boy }; int main (void) { static struct child she = { "Jerry", girl }; printf ("Hello %s %s.\n", he.gender == boy ? "boy" : "girl", he.name); printf ("Hello %s %s.\n", she.gender == boy ? "boy" : "girl", she.name); return 0; } ## 技巧 在gdb中,可以使用如下命令查看变量的类型: (gdb) whatis he type = struct child 如果想查看详细的类型信息: (gdb) ptype he type = struct child { char name[10]; enum {boy, girl} gender; } 如果想查看定义该变量的文件: (gdb) i variables he All variables matching regular expression "he": File variable.c: struct child he; Non-debugging symbols: 0x0000000000402030 she 0x00007ffff7dd3380 __check_rhosts_file 哦,gdb会显示所有包含(匹配)该表达式的变量。如果只想查看完全匹配给定名字的变量: (gdb) i variables ^he$ All variables matching regular expression "^he$": File variable.c: struct child he; 注:`info variables`不会显示局部变量,即使是static的也没有太多的信息。 详情参见[gdb手册](https://sourceware.org/gdb/onlinedocs/gdb/Symbols.html) ## 贡献者 xmj