123456
for(i=1;i<=4;i++){ for(j=1;j>=8;j++){ cout<<"*"; } cout<<endl; }
123456789
int i,j,x; x=2; for(i=0;i<4;i++){ for(j=0;j<x;j++){ cout<<"*"; } cout<<endl; x+=2; }
123456789101112131415
int main() { for(int i=1;i<=100;i++) { int n = i; while(n!=0) { cout << "*"; n--; } cout << endl; } getchar(); return 0; }