#define szSTR
#define fileDB \"c:\\\\contact.txt\"
struct CONTACT {
char num[szSTR];/*教室编号*/ char site[szSTR];/*教室位置*/ char snum[szSTR];/*座位数*/ char tv[szSTR];/*有无多媒体*/ char use[szSTR];/*是否可用*/ };
typedef struct CONTACT CON;
#define ANUM 1 #define ASITE 2 #define ASNUM 3 #define ATV 4 #define AUSE 5
#define BFULL 0xFF
int OPER[6] = {BFULL, ANUM, ASITE, ASNUM, ATV,AUSE};
void input(CON * s, int mask) {
if(mask & ANUM) { printf(\"请输入教室编号：\"); scanf(\"%s\ if(mask & ASITE) { printf(\"请输入教室位置：\"); scanf(\"%s\ if(mask & ASNUM) { printf(\"请输入座位数：\"); scanf(\"%s\
if(mask & ATV){printf(\"请输入是否有多媒体(有/Y*无/N):\");scanf(\"%s\ if(mask & AUSE) { printf(\"请输入是否可用(可/Y*否/N)：\"); scanf(\"%s\}/*end input*/
void show (int id, CON * s) {
if(!s) return ; if(id)
printf(\"%d\%s\\%s\%s\\%s\\%s\\n\ id, s->num , s->site , s->snum , s->tv,s->use );
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else
printf(\"【编号】%s【教室编号】%s【位置】%s【座位数】%s【有无多媒体】%s【是否可用】%s\\n\
s->num , s->site , s->snum , s->tv,s->use ); /*end if*/ }/*end show*/
void regist(void) {
CON s; FILE * f = 0; input(&s, BFULL); f = fopen(fileDB, \"ab\"); fwrite(&s,sizeof(s),1,f); fclose(f);
printf(\"资料已保存！\\n\\n\\n\\n\"); }/*end regist*/
int browse(char * key, fpos_t * p, CON * s) {
FILE * f =0; int i = 0, r = 0; CON t; char * a = 0, * b = 0; fpos_t q; if(!s) return 0;
f = fopen(fileDB, \"rb\"); if(!f) {
printf(\"数据库暂无记录\\n\\n\\n\\n\"); return 0; }/*end if*/
printf(\"编号\教室编号\位置\座位数\有无多媒体(Y/N)\是否可用(Y/N)\\n\"); printf(\"----------------------------------------------------------------------\\n\"); while(!feof(f)) { fgetpos(f, &q);
r = fread(&t, sizeof(t), 1, f); if(r<1)break;
if(t.num[0]==0) continue; if(key) {
a = strstr(t.num , key); b = strstr(t.site , key);
if(a == 0 && b == 0) continue; }/*end if*/ if(p) *p = q;
if(s) memcpy(s, &t, sizeof(t)); i++;
show(i, &t); }/*end while*/
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fclose(f);
printf(\"----------------------------------------------------------------------\\n\\n\\n\\n\\n\"); return i;
}/*end browse*/
fpos_t query(CON * s) {
char key[szSTR]=\"\"; fpos_t p = 0; int r = 0; printf(\"请输入教室编号或者位置：\"); scanf(\"%s\
r = browse(key, &p, s); return r?p:-1; }/*end query*/
void clear(void) {
FILE * f = 0; CON s; fpos_t p = query(&s); if(p<0) return;
f = fopen(fileDB, \"rb+\"); fsetpos(f, &p);
memset(&s, 0, sizeof(s)); fwrite(&s, sizeof(s),1, f); fclose(f);
printf(\"记录已删除！\\n\\n\\n\\n\\n\"); }/*end clear*/
void modify(void) {
FILE * f = 0; CON s; int cmd = 0; fpos_t p = query(&s); if(p<0) return;
f = fopen(fileDB, \"rb+\"); fsetpos(f, &p); for(;;) {
show(0, &s);
printf(\"请选择：1-编号；2-位置；3-座位数；4-有无多媒体；5-是否可用；6-保存并退出；7-放弃修改并退出\\n\\n\\n\\n\"); scanf(\"%d\ switch(cmd) { case 1: case 2: case 3: case 4:
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case 5:
input(&s, OPER[cmd]); break; case 6:
fsetpos(f, &p);
fwrite(&s, sizeof(s), 1, f); case 7:
fclose(f); return; default:
printf(\"错误的操作，请重新输入。\\n\\n\\n\\n\\n\"); }/*end case*/ }/*mext*/ }/*end clear*/
int main(void) {
char cmd = 0; CON s; for(;;) {
printf(\" 欢迎使用 教室信息管理系统!\\n请选择：\\n1-添加；\\n2-查询；\\n3-删除；\\n4-修改；\\n5-全部输出；\\n0-退出\\n\\n\\n\\n\"); scanf(\"%d\ switch(cmd) { case 0: return 0;
case 1: regist(); break; case 2: query(&s); break; case 3: clear(); break; case 4: modify(); break;
case 5: browse(0, 0, &s); break; }//end case }
return 0; }
