统计数字字符个数

解题思路:
用ASCII码值实现
注意事项:

参考代码:

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

void countnumber(const char* ch)

{

char* p = ch;

int count = 0;

while (*p )

{

if (*p >=48 && *p <=57)

{

count++;

}

p++;

}

printf("%d", count);

}

int main(void)

{

char ch[256]="\0";

gets(ch);

countnumber(ch);

return 0;

}