C ++中的Isprint()
该函数isprint()是预定义函数，它检查传递的字符是否可打印。它返回非零值，否则返回零。该函数在“cctype”头文件中声明。
这是isprint()C++语言的语法，
int isprint(int character);
这里，
字符-要检查的字符。
这是isprint()C++语言的示例，
示例
#include<iostream>
#include<cctype>
using namespace std;
int main() {
int val1 = 28;
int val2 = 's';
int val3 = '\n';
if(isprint(val1))
cout << "value is printable"<< endl;
else
cout << "value is not printable"<< endl;
if(isprint(val2))
cout << "value is printable"<< endl;
else
cout << "value is not printable"<< endl;
if(isprint(val3))
cout << "value is printable"<< endl;
else
cout << "value is not printable"<< endl;
return 0;
}输出结果
value is not printable value is printable value is not printable
在上面的程序中，三个变量声明为val1，val2和val3。检查每个变量是否可打印。
if(isprint(val1)) cout << "value is printable"<< endl; else cout << "value is not printable"<< endl; if(isprint(val2)) cout << "value is printable"<< endl; else cout << "value is not printable"<< endl; if(isprint(val3)) cout << "value is printable"<< endl; else cout << "value is not printable"<< endl;