Unable to assign value and increment an int in C - c

Question

I have this program to generate armstrong numbers upto a given range. But the problem is that the range variable (n in this case) is somehow acting like a const. I cannot assign a value nor increment it... There are errors during compilation with gcc. The power function works fine (Same issue with pow() defind in math.h). I would like to know why this is happening to this code and the possible fix(es). Thank you
#include <stdio.h>
//#include <math.h>
int power(int a, int b) {
int c = 1;
for(int i = 0; i < b; i++) {
c *= a;
}
return c;
}
void main(void) {
int sum, y, temp;
printf("temp, y, sum, n\n");
for(int n = 1; n < 100; n++) {
temp = n;
printf("%d ", temp);
y = 0; // y to hold the number of digits of n
while (n > 0) {
n = n / 10;
y++;
}
printf("%d ", y);
n = temp;
sum = 0;
while(n > 0) {
sum += power((n % 10), y);
n = n / 10;
}
if (temp == sum) {
printf("%d ", sum);
}
printf("%d\n", n);
}
}
Output:
temp, y, sum, n
1 1 1 0
1 1 1 0
1 1 1 0
1 1 1 0
1 1 1 0
1 1 1 0
1 1 1 0
.
.
.

Answer 1

Are you not constantly dividing n by 10?
As n is an integer that starts as 1, and not a float, it would constantly set to 0.

Answer 2

Your second while(n > 0) loop effectively sets n=0 within
the outer for loop.
Did you want to use a second n = temp?

Answer 3

before the last printf statement add: n = temp;
try you code like this:
#include <stdio.h>
//#include <math.h>
int power(int a, int b) {
int c = 1;
for(int i = 0; i < b; i++) {
c *= a;
}
return c;
}
void main(void) {
int sum, y, temp;
printf("temp, y, sum, n\n");
for(int n = 1; n < 100; n++) {
temp = n;
printf("%d ", temp);
y = 0; // y to hold the number of digits of n
while (n > 0) {
n = n / 10;
y++;
}
printf("%d ", y);
n = temp;
sum = 0;
while(n > 0) {
sum += power((n % 10), y);
n = n / 10;
}
if (temp == sum) {
printf("%d ", sum);
}
n = temp;
printf("%d\n", n);
}
}

Answer 4

It is because the value of n is set to 0 outside the loop. Try the below code.
#include <stdio.h>
//#include <math.h>
int power(int a, int b) {
int c = 1;
for(int i = 0; i < b; i++) {
c *= a;
}
return c;
}
void main(void) {
int sum, y, temp;
printf("temp, y, sum, n\n");
for(int n = 1; n < 100; n++) {
temp = n;
printf("%d ", temp);
y = 0; // y to hold the number of digits of n
while (n > 0) {
n = n / 10;
y++;
}
printf("%d ", y);
n = temp;
sum = 0;
while(n > 0) {
sum += power((n % 10), y);
n = n / 10;
}
if (temp == sum) {
printf("%d ", sum);
}
n = temp;
printf("%d\n", n);
}
}