Bill Calculator

#include <stdio.h>
int main(){
int amount;                    
int sum=0;			//most important to declare outside the loop-----
while(1){
    printf("Enter the amount:\n");
    scanf("%d",&amount);
    if(amount!=0){
        sum=sum+amount;
        printf("Order total so far is: %d\n",sum);
        continue;
    }
    else{
        printf("Order total is: %d\n",sum);
        printf("Have a nice day ahead\n");
        break;
    }
}
return 0;
}