In an attempt to help learn C I’ve been trying to write a simple calculator, but I’m stuck on the issue of scanf not assigning the inputted value to a variable.
I’ve seen people recommend fgets over scanf but that brought more issues so I decided to stick with scanf for now.
the reason I have all the getchar(); and ” %dn” included in there is because the program would skip directly past those inputs otherwise.
Thank you.

#include <stdio.h>
#include <string.h>

int main() {
    int numberOne;
    int numberTwo;
    int result;
    char operation[8];
    printf("Enter your first number: n");
    scanf(" d%n", &numberOne);
    getchar();
    printf("Enter your second number: n");
    scanf(" d%n", &numberTwo);
    getchar();
    printf("Enter the operation to perform on these numbers. n");
    printf("Add, Subtract, Multiply, Divide. n");
    scanf(" s%n", &operation);
    printf("operation=%sn", operation);
    printf("numberOne=%dn", numberOne);
    printf("numberTwo=%dn", numberTwo);
    if (strcmp(operation, "Add") == 0) {
        result = numberOne + numberTwo;
        printf("d%", result);
        return result;
    }
    if (strcmp(operation, "Subtract") == 0) {
        result = numberOne - numberTwo;
        printf("d%", result);
        return result;
    }
    if (strcmp(operation, "Multiply") == 0) {
        result = numberOne * numberTwo;
        printf("d%", result);
        return result;
    }
    if (strcmp(operation, "Divide") == 0) {
        result = (float) numberOne / numberTwo;
        printf("f%", result);
        return result;
    }
}