extra_numeral_systems

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

int findWhereIsChar(char forSearch, char * source){
	for (int i = 0; i < sizeof(source); i++){
		if (source[i] == forSearch)
			return i;
	}
	return -1;
}
char * ns_convert(char * dest, const char * source, unsigned int sourceBase, unsigned int destBase){
	char *strcpy (char *dest, const char *source);
	char * buffer = dest;
	/*check ifs valid*/
	char * numerics = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	int valid = 1; /*logical value*/

	for (int i = 0; i < sizeof(buffer); i++){
		if((char)buffer[i] != '.')
			if(findWhereIsChar(buffer[i], numerics) >= sourceBase)
				valid = 0;
	}
	if (valid){
		if (sourceBase != destBase){
			if (sourceBase != 10){
				/*convert to decimal*/
				int j = 0;
				int sumDec = 0;
				for (int i = sizeof(source); i >= 0; i--){
					sumDec += findWhereIsChar(buffer[i], numerics)*(sourceBase^(sizeof(buffer)-i));
				}
				sprintf (dest, "%d", sumDec);
			}
			if (destBase != 10){
				/*convert from decimal*/
			}
		}
	}
	return dest;
}
int main(){
	char buf[99];
	char * result = ns_convert(buf, "9", 12, 10);
	puts(result);
}