#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
char *superscriptinteger(char *buffer, int n){
/* 0 1 2 3 4 */
char superscript[10][4] = {"\u2070", "\u00B9", "\u00B2", "\u00B3", "\u2074",
"\u2075", "\u2076", "\u2077", "\u2078", "\u2079"};
/* 5 6 7 8 9 */
int digit;
static bool finished = true;
if (n == 0 && finished){
sprintf(buffer, "%.3s", superscript[0]);
return buffer;
}
if (finished) {
buffer[0] = '\0';
finished = false;
}
if (n < 0){
strcat(buffer, "\u207B"); // sinal negativo -
n = -n;
}
if (n > 0){
digit = n % 10;
superscriptinteger(buffer, n/10);
strcat(buffer, superscript[digit]);
}
if (n == 0){
finished = true;
}
return buffer;
}
int main()
{
char expoente[22];
superscriptinteger(expoente, 1234);
printf("%s\n", expoente);
superscriptinteger(expoente, -1234);
printf("%s\n", expoente);
superscriptinteger(expoente, 0);
printf("%s\n", expoente);
printf("%d%s = %d\n", 2, superscriptinteger(expoente, 12), (int)pow(2, 12));
return 0;
}
