I have a school project that requires me to create a C program that includes password protection. I have a function handling logins but when a wrong password is entered the function still allows the user to continue through to the main section of the program. I tried using abort and exit but they don't help. It seems like they just exit the function instead of the program.
Here is my code.
void userlogin(void){
FILE *fp;
char uName[10], pwd[10];int i;char c;
pUser=(struct user *)malloc(sizeof(struct user));
printf("1. Login Through An Existing Account\n2. Create New account\n");
scanf("%d",& i);
//system("cls");
switch(i){
case 1:
if ( ( fp=fopen("user.dat", "r+")) == NULL) {
if ( ( fp=fopen("user.dat", "w+")) == NULL) {
printf ("Could not open file\n");
exit ( 1);
}
}
printf("Username: ");
scanf("%9s",uName);
printf("Password: ");
scanf("%9s",pwd);
while ( fread (pUser, sizeof(struct user), 1, fp) == 1) {
if( strcmp ( pUser->username, uName) == 0) {
printf ("Match username\n");
if( strcmp ( pUser->password, pwd) == 0) {
printf ("Match password\n");
//accessUser();
}
else if ( strcmp ( pUser->username, uName) == 1){
printf("INCORRECT PASSWORD\n");
printf("ACCESS DENIED");
abort();
}
}
}
break;
case 2:
do
{
if ( ( fp=fopen("user.dat", "a+")) == NULL) {
if ( ( fp=fopen("user.dat", "w+")) == NULL) {
printf ("Could not open file\n");
exit ( 1);
}
}
printf("Choose A Username: ");
scanf("%9s",pUser->username);
printf("Choose A Password: ");
scanf("%9s",pUser->password);
fwrite (pUser, sizeof(struct user), 1, fp);
printf("Add another account? (Y/N): ");
scanf(" %c",&c);//skip leading whitespace
}while(c=='Y'||c=='y');
break;
}
printf("Welcome %s\n", uName);
free ( pUser);//free allocated memory
fclose(fp);
}
