Calculating the result of a power and a base without math.h - c

Question

At my university I was asked to create a program that asks the user for two inputs. One is the base and the other is the power of a number. I am not allowed to use math.h only loops.
This is my code thus far:
#include <stdio.h>
int main() {
int base;
printf(" Please enter the base: ");
scanf("%d", &base);
int power;
printf(" Please enter the power: ");
scanf("%d", &power);
printf("\n%d ^ %d is the same as...\n\n", base, power);
printf(" %d", base);
int reps;
int number;
for(reps = base; reps <= power; reps += 1) {
printf("* %d ", base);
}
for(number; number <= power;number += 1) {
int result = base * base;
for (result; number <= power; result = base * result) {
result = result * base;
printf("\n or %d", result);
}
}
return 0;
}
Please help me. I am so lost and I feel like crying :( not that it matters.

Answer 1

(Your main issue is that you are using an uninitialised variable; the behaviour of doing that in C is undefined.)
But let's rework the answer. The first thing to do is to separate the actual power function from all the input and output. With regards to that function, I'll put my favourite way into the answer pool on the understanding that you'll work through it carefully and understand it.
You can ace this problem using a technique called exponentiation by squaring:
int getPower(int base, int power/*must be non-negative*/)
{
int ret = 1;
while (power){
if (power & 1){ /*this means the current value of `power` is odd*/
ret *= base;
}
power >>= 1; /*ToDo - figure this out with your debugger*/
base *= base;
}
return ret;
}
The method is adequately explained in https://en.wikipedia.org/wiki/Exponentiation_by_squaring

Answer 2

The loop for calculating the power looks like this
int product = 1;
for(int multiplicationCounter = 1;multiplicationCounter <= power; multiplicationCounter ++) {
product *= base;
}
printf("Result is %d", product);
You can integrate this in your code, maybe change the output.
This should replace your whole second for-loop.

Answer 3

assume both base and power is positive integer,
then
int Result =1;
for (int i=0; i<=power;i++)
{
if(power==0)
Result=1;
Result =Result*base;
}

Answer 4

This should work
#include <stdio.h>
int main()
{
int base;
printf(" Please enter the base: ");
scanf("%d", &base);
int power;
printf(" Please enter the power: ");
scanf("%d", &power);
printf("\n%d ^ %d is the same as...\n\n", base, power);
printf(" %d", base);
int reps;
int number;
int result=1:
for(number=1; number <= power;number += 1)
{
result=result*base
}
printf("The result is %d", result);
return 0;
}