uppercase.c

#include <stdio.h>

#define A 65
#define a 97

int main(int argc, char**argv)
{
	int i = 1;
	while(i < argc)
	{
		int j = 0;
		while(argv[i][j] != '\0')
		{
			if (a <= argv[i][j] && a + 25 >= argv[i][j])
			{
				argv[i][j] += (A-a);
			}
			j++;
		}

		printf("%s", argv[i]);

		i++;
		if (i < argc)
		{
			printf(" ");
		}
	}
}