First of all, it is incredibly difficult to understand what you want. You need to post legible English (you know, don't post things like "this is str=ar tri angle", what does that even mean?).
Second, post your code in the code brackets to make it easier for people to read your code.
Is this what you're wanting?
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#include <iostream>
usingnamespace std;
int main() {
int i, j, k;
cin >> k;
for (j = 1; j <= k; j++) {
for (i = 1; i <= j; i++) {
cout << "*";
}
cout << endl;
}
}