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C????????????????????????????????????????????????C??????????????????
C?????????????????????????????????????????????????????????????????????????????????????????
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????????????????????????????cdecl.c????C????????????????????????????????????
#include#include #include #include #define MAXTOKENS 100#define MAXTOKENLEN 64enum type_tag { IDENTIFIER, QUALIFIER, TYPE };struct token { char type; char string[MAXTOKENLEN]; };int top = -1;struct token stack[MAXTOKENS];struct token this;#define pop stack[--top]#define push(s) stack[++top] = svoid gettoken() { char *s = this.string; while ((*s = getchar()) == ' ') { if (feof(stdin)) { *s = '\0'; break; } } if (isalnum(*s)) { push(this); while (isalnum(*s = getchar())) { *s = '\0'; } ungetc(*s, stdin); this.type = classify_string(); return; } if (*s == '*') { strcpy(this.string, "pointer to"); this.type = '*'; return; } this.string[1] = '\0'; this.type = *s; return;}void read_to_first_identifier() { gettoken(); while (this.type != IDENTIFIER) { push(this); gettoken(); } printf("%s is ", this.string); gettoken();}void deal_with_arrays() { while (this.type == '[') { printf("array "); gettoken(); if (isdigit(this.string[0])) { printf("0..%d ", atoi(this.string) - 1); gettoken(); } gettoken(); printf("of "); }}void deal_with_function_args() { while (this.type != ')') { gettoken(); } gettoken(); printf("function returning ");}void deal_with_pointers() { while (stack[top].type == '*') { printf("%s ", pop.string); }}void deal_with_declarator() { switch (this.type) { case '[': deal_with_arrays(); break; case '(': deal_with_function_args(); break; } deal_with_pointers(); while (top > 0) { if (stack[top].type == '(') { pop; gettoken(); deal_with_declarator(); } else { printf("%s ", pop.string); } }}int main() { read_to_first_identifier(); deal_with_declarator(); printf("\n"); return 0;}
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char * const * p;char (* c[10])(int **p);
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p is pointer to function returning pointer to charc is array of 10 pointers to function returning pointer to char, function takes pointer to pointer to int and returns pointer to char
???????????????????????????C????????????????????????????????C?????????????????????????????????????????????????????
????????????????Expert C Programming??????????????????????????????????????????????????????
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