Why doesen't it clear screen in if method (C language only)

I was trying to make a shell interpreter similar to DOS in C language (for fun obviously)

And when i type clear, as shown in the code below it should make it so it clears the screen. But it doesn't.

    #include <stdio.h>
    #include <stdlib.h>
    #include <conio.h>
    char command[128];
    int loop = 0;
    void main(){
        clrscr();
        printf("Starting shell\n");
        clrscr();
        while ( loop == 0){
            printf("command:");
            scanf("%s", &command);
            if(command=='clear'){
                printf("Clearing screen");
                clrscr();
            }  

/** Other Code **/

if(command=='clear')

it's not valid string comparison. use strcmp to compare string in C.

It should be

if (!strcmp(command, "clear"))
{
   printf("Clearing screen");
   clrscr();
}