##include <stdio.h>
##define BUF_LEN 128

#void task1() {
#	puts("===== task1 =====");

#	char infilepath[] = "files/text1.txt";
#	FILE* fin = fopen(infilepath, "r");
#	if (fin == NULL) {
#		printf("Cannot open file %s\n", infilepath);
#		return;
	}

#	char outfilepath[] = "files/out1.txt";
#	FILE* fout = fopen(outfilepath, "w");
#	if (fin == NULL) {
#		printf("Cannot open file %s\n", outfilepath);
#		return;
	}

#	char buf[BUF_LEN];
#	while (fgets(buf, BUF_LEN, fin) != NULL) {
#		for (int i = 0; buf[i] != '\0'; i++) {
#			if (buf[i] == '\t') {
#				buf[i] = '%';
			}
		}
#		fprintf(fout, "%s", buf);
#		printf(">>%s<<", buf);
	}
#	fclose(fin);
#	fclose(fout);
}

#int main() {

#	task1();



#	return 0;
}