读取一个文件中的字符，统计每个字符出现的次数

//统计每个字符出现的次数
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main()
{
    FILE *fp_read;
    char ch;
    int count[26];
    int index;
    fopen_s(&fp_read,"E:\first.txt","r");
    memset(count,0,sizeof(count));
    if(NULL == fp_read)
    {
        printf("Can not open the file!
");
        system("pause");
        return 0;
    }

    while(!feof(fp_read))
    {
        ch = fgetc(fp_read);
        if(ch >= 'a' && ch <= 'z')
            count[ch - 'a']++;
    }
    for(index = 0; index < 26; index++)
        if(count[index] != 0)
            printf("%c:	%d
",index+97, count[index]);

    fclose(fp_read);

    system("pause");
    return 0;
}