int main(void){
int user_choice, x, n, d, val;
printf("Welcome to Math Is Fun - beta version\n");
printf("Supported operations are:\n");
printf("1 - Power Calculation\n");
printf("2 - Prime Check\n");
printf("3 - Palindrome Check\n");
printf("Please enter operation number (1/2/3): \n");
scanf("%d",&user_choice);
switch (user_choice){
case 1:
printf("Please enter three space separated numbers: \n");
scanf("%d %d %d",&x, &n, &d);
val = funPow(x,n,d);
printf("res = %d\n", val);
break;
case 2:
printf("Please enter an integer: \n");
scanf("%d",&x);
val = funPrimeCheck(x);
printf("res = %s\n", (val ? "true" : "false"));
break;
case 3:
printf("Please enter an integer: \n");
scanf("%d",&x);
val = funPalindromeCheck(x);
printf("res = %s\n", (val ? "true" : "false"));
break;
default:
break;
}
return 0;
}
int funPow(int x, int n, int d) {
int result = 1;
if (n == 0) return 1;
if (n == 1) return funModulu(x, d);
result = funPow(x, n / 2, d);
result = ((result % d) * (result % d)) % d;
if ((n % 2) == 1) {
result = ((result % d) * (x % d)) % d;
}
return result;
}