#include <stdio.h>
#include <string.h>
bool search(char id[], char pass[]) {
FILE *fp
char tid[10], tpass[10]
fp = fopen("c:\\data", "r")
while (!feof(fp)) {
fscanf(fp, "%s%s", tid, tpass)
if (strcmp(tid, id)==0 &&strcmp(tpass, pass)==0) {
fclose(fp)
return true
}
}
fclose(fp)
return false
}
bool login() {
char id[10], pass[10]
printf("Login\nPress the id: ")
scanf("%s", id)
printf("Press the password: ")
// 可以自行将password处理成*号, 如果不会可以发信给我
scanf("%s", pass)
printf("-----------------------")
if (search(id, pass))
return true
else
return false
}
void _add(char id[], char pass[]) {
FILE *fp
fp=fopen("c:\\data", "a")
// 在写入文件时可以按一定的排序方式插入，可减少以后Login时的search时间
fprintf(fp, "%s %s\n", id, pass)
fclose(fp)
}
void regis() {
char id[10], pass[10], tpass[10]
printf("Register\nPress the id: ")
scanf("%s", id)
while (true) {
printf("Press the password: ")
scanf("%s", pass)
printf("Press the password again: ")
scanf("%s", tpass)
if (strcmp(pass, tpass) != 0)
printf("The passwords you pressed are not the same!\n")
else
break
}
_add(id, pass)
printf("-----------------------Register successfully!\n")
}
void init() {
FILE *fp
if ((fp=fopen("c:\\data", "r")) == NULL) { // 注意，一定要有个名叫data（没有扩展名）的合法文件在C盘根目录
printf("---------File is not exist\n")
system("pause")
exit(0)
}
else
fclose(fp)
}
int main(void){
int command
init() // 检查data文件在不在
while (true) {
printf("-----------------------(Login: 1 Register: 2 Exit: 3)\n")
scanf("%d", &command)
printf("-----------------------\n")
// 这里可以编写command的检测语句
if (command == 3)
break
else if (command == 1) {
if (!login())
printf("ID is not exist or password is wrong!\n")
else
printf("Login successfully!\n")
}
else
regis()
}
return 0
}
搞定了。。。我是用成功了的。。。如果有问题就发信给我。。。。
