#include <iostream>
#include <fstream>
#include <cctype>
using namespace std;
int alpha[26];
int main(int argc, char *argv[])
{
char ch;
if(argc!=2) {
cout << "Usage: COUNT <source>\n";
return 1;
}
ifstream in(argv[1]);
if(!in) {
cout << "Cannot open input file.\n";
return 1;
}
// init alpha[]
int i;
for(i = 0; i <26; i++) alpha[ i ] = 0;
while(!in.eof()) {
ch = in.get();
if(isalpha(ch)) {
ch = toupper(ch);
alpha[ch-'A']++;
}
};
for(i = 0; i <26; i++) {
cout << (char) ('A'+ i) << ": " << alpha[ i ] << '\n';
}
in.close();
return 0;
}
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