Calculator 2

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

int main(int argc, char *argv[]) {
    float num1;
    float num2;
    float result;
    char operation;

    while(scanf("%f %c %f", &num1, &operation, &num2) != EOF) {
        if (strcmp(&operation, "+") == 0){
            result = num1 + num2;
            printf("%.2f\n", result);
        } else if (strcmp(&operation, "-") == 0){
            result = num1 - num2;
            printf("%.2f\n", result);
        } else if (strcmp(&operation, "x") == 0){
            result = num1 * num2;
            printf("%.2f\n", result);
        } else if (strcmp(&operation, "/") == 0){
            result = num1 / num2;
            printf("%.2f\n", result);
        } else {
            fprintf(stderr, "Invalid arguments!\n");
            return 1;
        }
    }

    return 0;
}