I/O in c without printf and scanf.

Problem

I/O in c without printf and scanf.

Method 1 - getchar and putchar
int getchar();
int putchar(int value);

Sample Program

#include <stdio .h>  
int main(void)  
{  
    int c;  
    while ((c = getchar()) != EOF)  
    {  
        putchar(c);  
    }  
    return 0;  
}

Note the use of parentheses. c=gethar()!=EOF implies whether c = 0 or 1 depending on whether character get is not EOF or is EOF. EOF is 257 , so use int rather than char.

Method 2 - gets and puts
gets(name of string) ;
int puts(name of string);
for puts - It terminates the line with a new line, ‘\n’. It will return EOF is an error occurred. It will return a positive number on success.
Sample code

char name\[60\];  
  
if ((pt = gets(name)) == NULL)  
{  
    printf("Error on read\\n");  
    return(1);  
}  
puts(name);

Thanks

kodeknight c

See also