Write a C program to clear screen and authenticate user.
#include <string.h>
int main() {
char username[10], user[2][10] = {"Sam", "Anderson"};
char password[10], pass[2][10] = {"hello", "world"};
int i = 0, ch;
/* get the username from the user */
printf("Username:");
fgets(username, 10, stdin);
username[strlen(username) - 1] ='\0';
/* get the password from the user */
printf("Password:");
fgets(password, 10, stdin);
password[strlen(password) - 1] = '\0';
/* clear the screen */
system("clear");
/* if user is not sam/anderson, then he is invalid user */
if (strcmp(username, user[0]) != 0 &&
strcmp(username, user[1]) != 0) {
printf("Invalid user!!\n");
return 0;
}
/* authenticating the given user */
if (strcmp(username, user[0]) == 0 &&
strcmp(password, pass[0]) == 0) {
printf("Hello Sam!! ");
printf("Welcome To See-Programming!!\n");
} else if (strcmp(username, user[1]) == 0 &&
strcmp(password, pass[1]) == 0) {
printf("Hello Anderson!! ");
printf("Welcome to See-Programming!!\n");
} else {
printf("Invalid User!!\n");
}
return 0;
}
Output:
Hello Sam!! Welcome To See-Programming!!
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