#include <stdio.h>
#include <ctype.h>
int main() {
	int c;
	FILE *infile, *outfile;
	infile=fopen("infile.txt", "r");
	if (infile==NULL) {
		printf("Kan file infile.txt niet openen!");
	}
	else {
		outfile=fopen("outfile.txt", "w");
		if (outfile==NULL) {
			printf("Kan file outfile.txt niet openen!");
		}
		else {
			c=getc(infile);
			while (c!=EOF) {
				c=putc(toupper(c), outfile);
				if (c==EOF) {
					printf("Fout tijdens schrijven in outfile.txt!");
				}
				else {
					c=getc(infile);
				}
			}
			fclose(outfile);
		}
		fclose(infile);
	}
	getchar();
	return 0;
}