#include #include void main() { int i=0,count1[26]={0},count2[26]={0}; char ch[100]; printf("enter a sentence:"); gets( ch ); while( ch[i] ) {if(ch[i]>='a'&&ch[i]<='z') count1[ch[i]-'a']++; else if(ch[i]>='A'&&ch[i]<='Z') count2[ch[i]-'A']++;i++;} for(i=0;i<26;i++) {if( i % 5==0 )putchar('\n'); printf(" 字母%c : %d ",'a'+i,count1[i]);} for(i=0;i<26;i++) {if( i % 5==0 )putchar('\n'); printf(" 字母%c : %d ",'A'+i,count2[i]);} }