Given an integer from any base 2 to 16, convert it into another base 2 to 16. So Binary can be converted to hex, hex to octal or decimal to hex or hex to base 3, hexadecimal to base 8 etc etc..
Program/Code is in C/C++/linux/g++
#include <iostream>
#include <inttypes.h>
#include <math.h>
using namespace std;
void convertbase(char *inp, uint16_t inp_base, char *out, uint16_t out_base);
bool validateinp(char *inp, uint16_t inp_base);
main()
{
char inp[64] = {'\0'};
char out[64] = {'\0'};
uint16_t inp_base, out_base;
cout << "enter the base of input number (between 2 to 16): ";
cin >> inp_base;
if (inp_base < 2 || inp_base > 16) {
cout << "output base not valid." << endl;
return -1;
}
cout << "enter input number: ";
cin >> inp;
bool isInpValid = validateinp(inp, inp_base);
if (!isInpValid) {
cout << "input num is not valid." << endl;
return -1;
}
cout <<"enter the base of output number (between 2 to 16): ";
cin >> out_base;
if (out_base < 2 || out_base > 16) {
cout << "output base not valid." << endl;
return -1;
}
convertbase(inp, inp_base, out, out_base);
}
bool validateinp(char *inp, uint16_t base) {
char *ch = inp;
uint32_t val;
while (*ch != '\0') {
val = (*ch > '9') ? ((*ch >= 'a') ? (*ch - 'a' + 10) : (*ch - 'A' + 10)) : (*ch - '0');
if (val >= base) {
return false;
}
if (!((*ch >= 0 && *ch <= '9') || (*ch >= 'A' && *ch <= 'F' ) || (*ch >= 'a' && *ch <= 'f'))) {
return false;
}
ch++;
}
return true;
}
void convertbase(char *inp, uint16_t inp_base, char *out, uint16_t out_base)
{
uint32_t val = 0, r = 0, i = 0, decimal = 0;
char ch1, *ch = inp;
while (*ch != '\0') {
val = (*ch > '9') ? ((*ch >= 'a') ? (*ch - 'a' + 10) : (*ch - 'A' + 10)) : (*ch - '0');
decimal = (decimal * inp_base) + val;
ch++;
}
while (decimal > 0) {
r = decimal % out_base;
ch1 = (r >= 10) ? (r - 10 + 'A') : ('0' + r);
out[i++] = ch1;
decimal = decimal / out_base;
}
out[i] = '\0';
for (r = 0; r < i/2; r++) {
ch1 = out[r];
out[r] = out[i - r - 1];
out[i - r - 1] = ch1;
}
cout << "output is " << out << endl;
}
Program/Code is in C/C++/linux/g++
#include <iostream>
#include <inttypes.h>
#include <math.h>
using namespace std;
void convertbase(char *inp, uint16_t inp_base, char *out, uint16_t out_base);
bool validateinp(char *inp, uint16_t inp_base);
main()
{
char inp[64] = {'\0'};
char out[64] = {'\0'};
uint16_t inp_base, out_base;
cout << "enter the base of input number (between 2 to 16): ";
cin >> inp_base;
if (inp_base < 2 || inp_base > 16) {
cout << "output base not valid." << endl;
return -1;
}
cout << "enter input number: ";
cin >> inp;
bool isInpValid = validateinp(inp, inp_base);
if (!isInpValid) {
cout << "input num is not valid." << endl;
return -1;
}
cout <<"enter the base of output number (between 2 to 16): ";
cin >> out_base;
if (out_base < 2 || out_base > 16) {
cout << "output base not valid." << endl;
return -1;
}
convertbase(inp, inp_base, out, out_base);
}
bool validateinp(char *inp, uint16_t base) {
char *ch = inp;
uint32_t val;
while (*ch != '\0') {
val = (*ch > '9') ? ((*ch >= 'a') ? (*ch - 'a' + 10) : (*ch - 'A' + 10)) : (*ch - '0');
if (val >= base) {
return false;
}
if (!((*ch >= 0 && *ch <= '9') || (*ch >= 'A' && *ch <= 'F' ) || (*ch >= 'a' && *ch <= 'f'))) {
return false;
}
ch++;
}
return true;
}
void convertbase(char *inp, uint16_t inp_base, char *out, uint16_t out_base)
{
uint32_t val = 0, r = 0, i = 0, decimal = 0;
char ch1, *ch = inp;
while (*ch != '\0') {
val = (*ch > '9') ? ((*ch >= 'a') ? (*ch - 'a' + 10) : (*ch - 'A' + 10)) : (*ch - '0');
decimal = (decimal * inp_base) + val;
ch++;
}
while (decimal > 0) {
r = decimal % out_base;
ch1 = (r >= 10) ? (r - 10 + 'A') : ('0' + r);
out[i++] = ch1;
decimal = decimal / out_base;
}
out[i] = '\0';
for (r = 0; r < i/2; r++) {
ch1 = out[r];
out[r] = out[i - r - 1];
out[i - r - 1] = ch1;
}
cout << "output is " << out << endl;
}
