#include <stdio.h>
#include <string.h>

int main (int argc,char* argv[])
{
    if(strcmp(argv[2],"+")==0)
        printf ("\n%s + %s = %d\n",argv[1],argv[3],atoi(argv[1])+atoi(argv[3]));
    else if(strcmp(argv[2],"-")==0)
        printf ("\n%s - %s = %d\n",argv[1],argv[3],atoi(argv[1])-atoi(argv[3]));
    else if((strcmp(argv[2],"*")==0) || (strcmp(argv[2],"x")==0))
        printf ("\n%s * %s = %d\n",argv[1],argv[3],atoi(argv[1])*atoi(argv[3]));
    else if((strcmp(argv[2],"/")==0))
    {
        if(strcmp(argv[3],"0")==0)
            printf ("\n\nDivisao invalida.\n\n");
        else
            printf ("\n%s / %s = %f\n",argv[1],argv[3],(float)atoi(argv[1])/atoi(argv[3]));
    }
    else
        printf ("\nCaracteres ou operador invalido(s)\n");
    return 0;
}