练习1求 1100 的偶数的和;#include using namespace std;int main()int i=1,sum=0;while(iusing namespace std;int main()int count=0;char ch;coutusing namespace std;int main ()char c;int letters=0,space=0,digit=0,other=0;cout=a int main( ) int i,j;for(i=1;iusing namespace std;int main()int i,j;for(i=1;i=4;i+)for(j=1;j=8-2*i; j+)cout ;for(j=1;j=2*i-1;j+)cout*;coutendl;return 0;