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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int n,i=1,sum=1;
  5.  
  6. scanf("%d",&n);
  7. do{
  8. sum = sum*i;
  9. i = i+1;
  10. }while(i<=n);
  11. printf("1×2×・・・×%d = %d",n,sum);
  12. return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5316KB
stdin
10
stdout
1×2×・・・×10 = 3628800