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int main(void) {
int i;
char filename[20];
for (i = 1; i < 12; i++) {
sprintf(filename, "%d.txt", i);
printf("%s\n", filename);
}
return 0;
}
//1.txt
//2.txt
//3.txt
//4.txt
//5.txt
//6.txt
//7.txt
//8.txt
//9.txt
//10.txt
//11.txt