Count each char in a String

//Count char by FamiHug 05.01.2011 14:13:09
//Ver 1.0 chi nhap chu cai IN HOA VD: ABEAVDFSDEF

#include <stdio.h>

int main()
{
    int i,temp;
    int cntr[26]={0};
    while((temp=getchar())!='\n')
        cntr[(temp-'A')]++;
    for(i=0;i<26;i++)
        if(cntr[i]>0) printf("%c_%d ",i+'A',cntr[i]);
    return 0;
}