lambda, C (gcc) - rextester

lambda

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
typedef struct
{
    char number[101];
    unsigned short x;
    unsigned short y;
    
}datos;
// Prototypes.
unsigned short checkTheNumber(char *, unsigned short);
unsigned long long convertToBase10(char *, unsigned short );
unsigned long long baseConversion(unsigned long long, unsigned short);
// --------------------------------------Main program-----------------------------------------
int main(void)
{
    unsigned short i;
    unsigned short N;
    unsigned long long numberTo10;
    char * pEnd;
   
    scanf("%hu\n", &N);
    datos numeros[N];
    for (i = 0 ; i < N ; i++)
        scanf("%100s %hu %hu", numeros[i].number, &numeros[i].x, &numeros[i].y);
    
    for (i = 0 ; i < N ; i++)
        if (checkTheNumber(numeros[i].number, numeros[i].x))
        {
            numberTo10 = strtoull(numeros[i].number, &pEnd,numeros[i].x);
            //printf("%llu\n", numberTo10);
            if ( numeros[i].y == 10)
                printf("El numero %s escrito en base %hu es igual a %llu en base %hu.\n", numeros[i].number, numeros[i].x, numberTo10,numeros[i].y);
            else
            {
                //baseConversion(numberTo10, numeros[i].y);
                printf("El numero %s escrito en base %hu es igual a %llu en base %hu.\n", numeros[i].number, numeros[i].x, baseConversion(numberTo10, numeros[i].y),numeros[i].y);   
            }
            
        }
        else
            printf("El numero %s NO se encuentra en base %hu.\n", numeros[i].number, numeros[i].x);

return 0;
}
unsigned short checkTheNumber(char *number, unsigned short base)
{
    unsigned short digit;
    
    if (base < 11)
    {
        while ( *number != '\0')
        {
            if ( isalpha( *number ))
                return 0;
            digit = ( (unsigned short) *number ) - 48;
            if (digit >= base)
                return 0;
            number ++;
        }
    }
    else
    {
        while ( *number != '\0')
        {
            if ( isalpha ( *number ) )
            {
                if ( islower( *number ) )
                    *number = toupper( *number );
                digit = (unsigned short) *number - 55;
                
                if ( digit >= base)
                    return 0;
            }
            else
            {
                digit = ( (unsigned short) *number ) - 48;
                if (digit >= base)
                    return 0;
            }
                
            number ++;   
        }
        
    }
    return 1;
    
}

unsigned long long baseConversion(unsigned long long number, unsigned short base)
{
    short i;
    unsigned long long sum;
    unsigned long long rest;
    i = 0;
    sum = 0;
    /*
    while ( number >= base)
    {
        rest = number % base;
        sum = sum + ( rest * (pow(10, i) ) );
        number /= 10;
        i ++;
    }*/
    while ( number > 0)
    {
        rest = number % base;
        sum = sum + ( rest * (pow(10, i) ) );
        number /= base;
        i ++;
    }
    
    return sum;
}
/*
unsigned long long convertToBase10(char *number, unsigned short base)
{
    unsigned long long sum = 0;
    unsigned long long digit;
    unsigned short exponent = 0;
    unsigned short length;
    short i;
    
    length = strlen(number);
    
    for (i = length - 1 ; i >= 0 ; i--)
    {
        if ( isalpha ( number[i] ) )
        {
            if ( islower( number[i] ) )
                    number[i] = toupper( number[i] );
            
            digit = ( (unsigned long long) number[i] ) - 55;
            
            digit = digit * ( (unsigned long long) pow(base, exponent) );
            
        }
        else
        {
            digit = ( (unsigned long long) number[i] ) - 48;
            digit = digit * ( (unsigned long long) pow(base, exponent) );    
        }
        exponent ++;    
        sum += digit;
    }
   
    return sum;
}*/


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