#include <stdio.h>

int main()
{
    float var1, var2, rez;
    int command;
    int k=1;

    while (k==1)
    {
        printf("**************************\n");
        printf("*-- Terminal calculator --*\n");
        printf("**************************\n");
        printf("\n");
        printf("Choose operation\n");
        printf("\n");
        printf("[1] Multiply \n");
        printf("[2] Divide \n");
        printf("[3] Plus \n");
        printf("[4] Minus \n");
        printf("[5] Module of 2 numbers \n");
        printf("[6] Percentage \n");
        printf("[7] Exit \n");

        scanf("%d", &command);

        switch (command)
        {
            case 1:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Second operand:\n");
                scanf ("%f", &var2);
                rez = (var1 * var2);
                printf("Result: %f\n", rez);
                break;

            case 2:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Drugi operand:\n");
                scanf ("%f", &var2);
                rez = (var1 / var2);
                printf("Result: %f\n", rez);
                break;

            case 3:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Second operand:\n");
                scanf ("%f", &var2);
                rez = (var1 + var2);
                printf("Result: %f\n", rez);
                break;

            case 4:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Second operand:\n");
                scanf ("%f", &var2);
                rez = (var1 - var2);
                printf("Result: %f\n", rez);
                break;

            case 5:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Second operand:\n");
                scanf ("%f", &var2);
                rez = ((int)var1 % (int)var2);
                printf("Result: %f\n", rez);
                break;

            case 6:
                printf("WRITE THE FIRST AND SECOND OPERAND\n\n");
                printf("First operand:\n");
                scanf ("%f", &var1);
                printf("\n");
                printf("Second operand:\n");
                scanf ("%f", &var2);
                rez = ((var1 * var2)/100);
                printf("Result: %f %\n", rez);
                break;

            case 7:
                k=0;
                break;

            default:
                printf ("Unijeli ste krivi znak!\n");
        }
    }

    return 0;
}