c语言 结构体数组

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#include <string.h> #include <stdarg.h> #include <stdio.h> #include <limits.h> #include <stdio.h> #define CONFIG_DIR "/etc/usbs/"   struct macro {     const char *name;     unsigned int code; }; #define URB_FUNCTION_SELECT_CONFIGURATION            0x0000 #define URB_FUNCTION_SELECT_INTERFACE                0x0001 #define K_V(a) {#a, a},   struct macro usb_funcs[]={ K_V( URB_FUNCTION_SELECT_CONFIGURATION           ) K_V( URB_FUNCTION_SELECT_INTERFACE               ) {0,0}}; const char * func2name(unsigned int func) {     int i;     for(i=0;usb_funcs[i].name;i++){         if(func==usb_funcs[i].code)             return usb_funcs[i].name;     }     return "Unknown func code"; } int main() {       printf("%s",func2name(URB_FUNCTION_SELECT_INTERFACE));              return 0; }