#include<stdio.h>int main(){  int sz[10]={0},zm[26]={0},z[26]={0},i,space=0,e=0,t=0;  char c;  printf("請輸入一段字符，統計其中各字符的數量/n");  while((c=getchar())!='/n')  {    if(c<='z'&&c>='a')      zm[c-'a']++;    else if(c<='Z'&&c>='A')      z[c-'A']++;    else if(c<='9'&&c>='0')      sz[c-'0']++;    else if(c==' ')      space++;    else      e++;  }  printf("/n/n");  for(i=0;i<=9;i++)  {    t++;    printf(" %d的個數為%d  ",i,sz[i]);    if(t%3==0)      printf("/n");  }  t=0;  printf("/n/n/n");  for(i=0;i<=25;i++)  {    t++;    printf(" %c的個數為%d  ",i+97,zm[i]);    if(t%3==0)      printf("/n");  }  t=0;  printf("/n/n/n");  for(i=0;i<=25;i++)  {    t++;    printf(" %c的個數為%d  ",i+65,z[i]);    if(t%3==0)      printf("/n");  }  t=0;  printf("/n/n/n");  printf(" 空格的個數為%d/n/n",space);  printf(" 其他字符的個數為%d/n",e);  return 0;}

#include <stdio.h>#define MAXWORD 30  //單詞的最大長度#define IN 1  //在單詞內，即沒有遇到空格#define OUT 0  //在單詞外，即遇到了空格/*word length ==> wl單詞長度簡稱*/int wl(){  char c;  int i;  int nc;  int state;  //state為單詞的狀態：IN或OUT;  int overflow;  //操過MAXWORD的單詞個數  int wl[MAXWORD]; //長度為1~30的的字符長度統計  state = OUT;  nc = 0;  overflow = 0;  for(i = 1; i < MAXWORD; ++i)    wl[i] = 0;  while((c = getchar()) != EOF)    if(c == ' ' || c == '/n' || c == '/t')    {      state = OUT;      if(nc > 0)        if(nc < MAXWORD)          ++wl[nc];        else          ++overflow;      nc = 0;    }    else if(state == OUT)    {      state = IN;      nc = 1;    }    else      ++nc;    for(i = 1; i < MAXWORD; ++i)      printf("長度為：%d的單詞個數為：%d : /n/n", i, wl[i]);      return 0;}main(){  wl();}