例如:2+22+222+2222+22222
代码如下:
int count_front5(int num) { int i = 0; int count = 0; for (i = 0; i < 5; i++) { count += count * 10 + num; } return count; } int main() { int num = 0; int count = 0; scanf("%d", &num); count = count_front5(num); printf("%d\n", count); return 0; }