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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, sum=0;
  6. 	cin>>n;
  7. 	for (int i=1; i<=n; i++){
  8. 		sum=0;
  9. 		for (int j=1; j<=i; j++){
  10. 			if (i==j) cout<<j;
  11. 			else cout<<j<<"+";
  12. 			sum += j;
  13. 		}
  14. 		cout<<"="<<sum<<endl;
  15. 	}
  16. 	return 0;
  17. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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5
stdout
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1=1
1+2=3
1+2+3=6
1+2+3+4=10
1+2+3+4+5=15
https://ideone.com/qIxFoO
language:
C++14 (gcc 8.3)
created:
14 hours ago
visibility:
public

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