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  1. #include<bits/stdc++.h>
  2. //Phan Thanh Nhàn 
  3. using namespace std;
  4. #define MAXN 100007
  5. int n,a[MAXN];
  6. int C[MAXN];		
  7. int B=0;
  8. void c3a(const char* input){
  9. 	FILE *f1=fopen(input,"r");
  10. 	if (!f1) 	return;
  11. 	fscanf(f1,"%d",&n);
  12. 	for(int i=0;i<n;i++)
  13. 		fscanf(f1,"%d",&a[i]);
  14. 	fclose(f1); 
  15. }
  16. int prime(int n){
  17. 	if(n<2)	return 0;
  18. 	for(int i=2;i<=sqrt(n);i++){
  19. 		if(n%i==0)	return 0;
  20. 	}
  21. 	return 1;
  22. }
  23. void c3b(const char* input){
  24. 	FILE *f1=fopen(input,"r");
  25. 	if (!f1) 	return;
  26.  
  27. 	fscanf(f1,"%d",&n);
  28. 	for(int i=0;i<n;i++){
  29. 		fscanf(f1,"%d",&a[i]);
  30. 		if(prime(a[i]))
  31. 			B++;
  32. 	}
  33.  
  34. 	fclose(f1);
  35. }
  36. void c3c(const char* input){
  37. 	FILE *f1=fopen(input,"r");
  38. 	if (!f1) 	return;
  39. 	fscanf(f1,"%d",&n);
  40. 	for(int i=0;i<n;i++)
  41. 		fscanf(f1,"%d",&a[i]);
  42.  
  43.  
  44. 	for(int i=0;i<n;i++)
  45. 		C[i]=a[i];
  46. 	//làm qua trung gian. Để không ảnh hưởng a[n] ban đầu
  47. 	//nhưng đối với bài này thì k có cx được
  48. 	//chỉ cần xóa cái copy trên và fix ở dưới là oke 
  49. 	for(int i=0;i<=n-2;i++)
  50. 		for(int j=0;j<=n-2-i;j++)
  51. 			if(C[j]>C[j+1])
  52. 				swap(C[j],C[j+1]);
  53.  
  54. 	fclose(f1);
  55. }
  56. void c3d(const char* input,const char* output){
  57. 	FILE *f1=fopen(input,"r"),*f2=fopen(output,"w");
  58. 	if (!f1||!f2) 	return;
  59. 	fprintf(f2,"%d \n",B);
  60. 	fscanf(f1,"%d",&n);
  61. 	for(int i=0;i<n;i++)
  62. 		fprintf(f2,"%d ",C[i]);
  63.  
  64. 	fclose(f1);fclose(f2);
  65. }
  66. int main(){
  67. 	const char* input="num_input.txt";
  68. 	const char* output="num_output.txt";
  69. 	c3a(input);
  70. 	c3b(input);
  71. 	c3c(input);
  72. 	c3d(input,output);
  73.  
  74. }
  75.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/ba1WCj
language:
C++14 (gcc 8.3)
created:
280 days ago
visibility:
public

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