c++编程

其他回答

#include <stdio.h>

int main(){ printf("Please input string:\n");

char buf[1024]; scanf_s("%s", buf, 1024);

char out[1024]; int n = 0; for (int i = 0; i < 1024; i++) {  if (buf[i] == 0) break;  if (buf[i] >= '0' && buf[i] <= '9')  {   out[n++] = buf[i];  } } out[n] = 0;

printf(out); getchar(); getchar();}