x=input()
s=0
for i in x:
    if i=="#":
        break
    if i in "Aa":
        s+=1
print(s)

Python的哦~

x=input()
s=0
for i in x:
    if i=="#":
        break
    if i in "Aa":
        s+=1
print(s)

#include <iostream>

using namespace std;

int main()
{
    string s1;
    cin>>s1;
    int sum=0;
    for(int i=0;i<s1.length();i++){
        if(s1[i]=='a' or s1[i]=='A'){
            sum=sum+1;
        }
    }
    cout<<sum<<endl;
    return 0;
}

#include <iostream> #include <string> using namespace std; int main(){ string s1; cin>>s1; int cnt=0; for(int i=0;i<s1.length();i++) if (s1[i]'a' or s1[i]'A') cnt=cnt+1; cout<<cnt<<endl; return 0; }