#include<stdio.h>
int main()
{void menu (void);
int add (int a1, int a2);
int sub (int b1, int b2);
int power (int c1, int c2);
int multiply (int d1,int d2);
int result=0,number1=0,number2;
char ch;
while (ch!='q')
{
    menu ();
    scanf("%c%d",&ch,&number2);
    if (ch=='+')
        number1=add (number1,number2);


    else if (ch=='-')
        number1=sub (number1,number2);

    else if (ch=='*')
        number1 =multiply (number1,number2);

    else if (ch=='^')
        number1=power (number1,number2);

}
return 0;}
void menu ()
{
    printf("+ add\n");
    printf("- subtract\n");
    printf("* multiply\n");
    printf("^ power\n");
    printf("q quit\n");
}
int add (int a1, int a2)
{
    int resa;
    resa=a1+a2;
    printf("Result so far is %d\n",resa);
    return resa;
}
int sub (int b1, int b2)
{
    int resb;
    resb = b1-b2;
    printf("Result so far is %d\n",resb);
    return resb;
}
int power (int c1, int c2)
    {int resc=1,pow=0;
    while (pow!=c2)
        {resc=resc*c1;
        pow++;
            }
    printf("Result so far is %d\n",resc);
    return resc;
}
int multiply (int d1,int d2)
    {int resd;
    resd= d1*d2;
    printf("Result so far is %d\n",resd);
    return resd;
}