/*不區分大小寫*/#include<stdio.h>int main(){int sum[26]={0};char s[1024]="";scanf("%s",s);int i;for(i=0;s[i];i++)if(s[i] >='a' && s[i] <='z')   {sum[s[i]-'a']++;   //sum[s[i]-'a']將a記作s[0],b記作s[1]...      }else if(s[i] >='A' && s[i]<='Z')sum[s[i]-'A']++; //sum[s[i]-'A']將A記作s[0],b記作s[1]...for(i=0;i<26;i++)if(sum[i])printf("'%c'or'%c'\t%d\n",i+'a',i+'A',sum[i] );return 0;}