#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void move_uppercase_to_beginning(char *s, int len) {
char *lowercase = (char *)malloc(len + 1 * sizeof(char));
char *uppercase = (char *)malloc(len + 1 * sizeof(char));
int uppercase_i = 0, lowercase_i = 0;
char ch;
for (int i = 0; i < len; i++) {
ch = s[i];
if (ch >= 'A' && ch <= 'Z')
uppercase[uppercase_i++] = ch;
else
lowercase[lowercase_i++] = ch;
}
for (int i = 0; i < lowercase_i; i++) {
s[i] = uppercase[i];
}
for (int i = uppercase_i, j = 0; i < len; i++, j++) {
s[i] = lowercase[j];
}
free(lowercase);
free(uppercase);
}
int main()
{
char arr[] = "C++ PHP Java";
move_uppercase_to_beginning(arr, strlen(arr));
puts(arr);
return 0;
}
/*
run:
CPHPJ++ ava
*/
