C++ 编程/代码/标准 C 库/函数/isdigit
isdigit
[编辑 | 编辑源代码]| 语法 |
#include <cctype>
int isdigit( int ch );
|
isdigit() 函数如果其参数是 0 到 9 之间的数字，则返回非零值。否则，返回零。
char c;
scanf( "%c", &c );
if( isdigit(c) )
printf( "You entered the digit %c\n", c );
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| 语法 |
#include <cctype>
int isdigit( int ch );
|
isdigit() 函数如果其参数是 0 到 9 之间的数字，则返回非零值。否则，返回零。
char c;
scanf( "%c", &c );
if( isdigit(c) )
printf( "You entered the digit %c\n", c );