Calculator


#include 

int main() {
    float a, b;
    char op;

    printf("Enter expression (e.g. 5 + 3): ");
    scanf("%f %c %f", &a, &op, &b);

    if (op == '+') printf("= %.2f\n", a + b);
    else if (op == '-') printf("= %.2f\n", a - b);
    else if (op == '*') printf("= %.2f\n", a * b);
    else if (op == '/') b != 0 ? 
    printf("= %.2f\n", a / b) :
    printf("Error! Divide by zero\n");
    else printf("Invalid operator!\n");

    return 0;
}


Enter expression (e.g. 5 + 3): 4 + 5
= 9.00