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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int s = 0;
  7. 	/*
  8. 	int i = 1;
  9. 	while (i <= 100) {
  10. 		s = s + i; // 累加
  11. 		i++;       // i往前走一步
  12. 	}
  13. 	*/
  14.  
  15. 	for (int i = 1; i <= 100; i++) {
  16. 		s = s + i;
  17. 	}
  18.  
  19. 	cout << "sum = " << s << endl;
  20.  
  21. 	return 0;
  22.  
  23. }
Success #stdin #stdout 0s 4524KB
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stdin
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Standard input is empty
stdout
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sum = 5050
https://ideone.com/LxW5Tv
for迴圈第一例：1 + 2 + 3 + ... + 100 = ?
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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