Question

统计一个字符串中出现各字母的次数(不分大小写)用指针 c语言

Answer 1

#include "stdlib.h"
#include<stdio.h>
#include<string.h>
void main()
{ int a[26],i;
  char str[256],*p;
  for ( i=0;i<26;i++ ) a[i]=0;
  scanf("%s",str); p=str;
  while ( *p )
  { if ( (*p)>='a' && (*p)<='z' ) a[(*p)-'a']++;
    else if ( (*p)>='A' && (*p)<='Z' ) a[(*p)-'A']++;
        p++;
  }
  for ( i=0;i<26;i++ ) printf("[%c]%d ",'a'+i,a[i]); printf("\n");
    system("pause");
}