int iscntrl(int ch) : iscntrl « ctype.h « C / ANSI-C

1. C / ANSI-C
2. ctype.h
3. iscntrl

int iscntrl(int ch)

//Declaration:  int iscntrl(int ch); 
//Return:       returns nonzero if ch is a control character or zero is returned. 

  #include <ctype.h>
  #include <stdio.h>

  int main(void)
  {
    char ch;

    for(;;) {
       ch = getchar( );
       if(ch == '.') {
          break;
       }
       if(iscntrl(ch)){
          printf("%c is a control char\n", ch);
       }
    }

    return 0;
  }

         
/*
1

 is a control char
2

 is a control char
3

 is a control char
.
*/
           
       

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