用C语言编输入一个整数输出其位数

int 类型所能容纳的数字位数不能超过 10。我写的这个程序稍微长了点,但不受 int 类型容量的限制,能够处理很长的整数输入（由 buffer 数组的大小决定）。这程序只处理纯整数输入。有疑问尽管问。  #include #include void main( ) {    int  count = 0;    char buffer[ 1001 ],         *p = buffer,         c;    puts( "Enter an integer:" );    gets( buffer );    // Skip leading space。    while( isspace( *p ) )        p++;    while( isdigit( c = *(p + count) ) )        count++;    // Ignore number with trailing non-space character。    if( c != '\0' && !isspace( c ) )        count = 0;    if( count > 0 )        printf( "The number of digit(s) in your integer is %d。\n",count );    else        puts( "You didn't provide a valid integer。\n" );}