cacl exemplo

// exemplo de calc que fiz pro meu brothe guinha
#include <stdio.h>

char  line[100],operator;
int   result,value;


char opcao_menu()
{
    int i;
    char *banner[] = {
        "Operator Calc",
        "coded by Cooler_  ",
        "put with example",
        "operators:+,-,*,/ ",
        "(s)para Sair",
        "-> ",
    };
    for(i=0; i<=5; i++)
        printf(" %s \n",banner[i]);
}

int main()
{
    opcao_menu();
    result = 0;

    while (1)
    {
        printf("Resultado: %d\n", result );
        printf("Digite Operador e o numero : ");

        fgets(line, sizeof(line), stdin);
        sscanf(line, "%c %d", &operator, &value);

        if ((operator == 's') || (operator == 'S'))
            break;
        if (operator == '+')
            result += value;
        if (operator == '/')
            result /= value;
        if (operator == '-')
            result -= value;
        if (operator == '*')
            result *= value;
    }
    return(0);
}