Запрос: Create an src/1948.c program that finds the largest prime divisor of any entered integer a and prints it to the screen. It is necessary to allocate a separate function for calculating this value. Do not use division and the operation of taking the re

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Запрос: Create an src/1948.c program that finds the largest prime divisor of any entered integer a and prints it to the screen. It is necessary to allocate a separate function for calculating this value. Do not use division and the operation of taking the re

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Create an src/1948.c program that finds the largest prime divisor of any entered integer a and prints it to the screen. It is necessary to allocate a separate function for calculating this value. Do not use division and the operation of taking the remainder of the division. However, if necessary, division can be realised by subtraction. For errors, display "n/a"

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Accepted Answer

```c
#include <stdio.h>

int largest_prime_divisor(int a) {
if(a <= 1) {
return -1; // -1 for n/a
}

int divisor = 2;
int largest = -1;

while(a > 1) {
if(a % divisor == 0) {
largest = divisor;
while(a % divisor == 0) {
a -= divisor;
}
}
divisor++;
}

return largest;
}

int main() {
int a;
printf("Enter an integer: ");
scanf("%d", &a);

int result = largest_prime_divisor(a);

if(result == -1) {
printf("n/a\n");
} else {
printf("The largest prime divisor of %d is: %d\n", a, result);
}

return 0;
}
```
```shell
$ gcc -o 1948 src/1948.c
$ ./1948
Enter an integer: 36
The largest prime divisor of 36 is: 3
```

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Запрос: Create an src/1948.c program that finds the largest prime divisor of any entered integer a and prints it to the screen. It is necessary to allocate a separate function for calculating this value. Do not use division and the operation of taking the re

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