switch statement

#include<stdio.h>
int main ()
{
    char operator;
    double firstnumber,secondnumber;
    printf("enter an operator(+ - * /) :");
    scanf("%c",&operator);
    printf("enter two operands:");
    scanf("%lf%lf",&firstnumber,&secondnumber);
    switch (operator)
    {
        case '+';
        printf("%.1lf+%.1lf = %.1lf",firstnumber,secondnumber,firstnumber+secondnumber);
        case '-';
        printf("%.1lf-%.1lf = %.1lf",firstnumber,secondnumber,firstnumber-secondnumber);
        break;
        case '*';
        printf("%.1lf*%.1lf = %.1lf",firstnumber,secondnumber,firstnumber*secondnumber);
        break;
        case '/';
        printf("%.1lf/%.1lf = %.1lf",firstnumber,secondnumber,firstnumber/secondnumber);
        break;
        default :
            printf(" the operator is not correct");

    }
    main ();
    return 0;
}