puts() and gets() function problems

[Unregistered]

I'm trying to read input from the keyboard without using scanf, and print to the screen without using printf. I'm not having much luck. Any sugguestions.

thanx

[Unregistered]

forgot to insert code. Lets try this again

#include<stdio.h>
#define MIN -10
#define MAX 10

int max(int val1, int val2);
int min(int val1, int val2);

int main()
{
int num1;
int num2;
int maxval;
int minval;

puts("Enter two numbers between -10 and 10.");
gets(num1);
gets(num2);

while ((num1 > MAX) || (num1 < MIN) || (num2 > MAX) || (num2 < MIN));
{
puts("Invalid input, please enter a number between -10 and 10!");
gets(num1);
gets(num2);
}

maxval = max(num1, num2);
puts("The maximum number is : ", maxval);

minval = min(num1, num2);
puts("The minimum number is : ", minval);

return 0;
}

int max(int val1, int val2)
{
return((val1 > val2) ?val1 : val2);
}

int min(int val1, int val2)
{
return((val1 < val2) ?val1 : val2);
}



#include<stdio.h>
#define MIN -10
#define MAX 10

int max(int val1, int val2);
int min(int val1, int val2);

int main()
{
int num1;
int num2;
int maxval;
int minval;

puts("Enter two numbers between -10 and 10.");
gets(num1);
gets(num2);

while ((num1 > MAX) || (num1 < MIN) || (num2 > MAX) || (num2 < MIN));
{
puts("Invalid input, please enter a number between -10 and 10!");
gets(num1);
gets(num2);
}

maxval = max(num1, num2);
puts("The maximum number is : ", maxval);

minval = min(num1, num2);
puts("The minimum number is : ", minval);

return 0;
}

int max(int val1, int val2)
{
return((val1 > val2) ?val1 : val2);
}

int min(int val1, int val2)
{
return((val1 < val2) ?val1 : val2);
}

[Stoned_Coder]

gets() stands for get string not get int.

so use gets() or better still fgets() to get a string from stdin into a char array. Pass that array to atoi() to get an integer.You cannot gets() an int the way you have tried.

[quzah]

fread()
fwrite()

It doesn't get much better than that.

Quzah.

[bigtamscot]

#include<stdio.h>
#define MIN -10 
#define MAX 10 

int max(int val1, int val2);
int min(int val1, int val2);

int main() 
{ 
int num1; 
int num2; 
int maxval; 
int minval; 

puts("Enter two numbers between -10 and 10."); 
fscanf(stdin, "%d %d", &num1, &num2);
/*you had syntax error ; at end of while */
while(num1 > MAX || num1 < MIN ||num2 > MAX || num2 < MIN)
{ 
puts("Invalid input, please enter a number between -10 and 10!"); 
fscanf(stdin, "%d %d", &num1, &num2);
}

maxval = max(num1, num2); 
fprintf(stderr,"\nThe maximum number is :%d ", maxval);
/* you had no format specifier for*/
/* maxval and minval in statments */
minval = min(num1, num2); 
fprintf(stderr,"\nThe minimum number is :%d ", minval);

return 0; 
} 

int max(int val1, int val2) 
{

  return  val1 > val2? val1:val2;
 }

int min(int val1, int val2) 
{

return val1 < val2? val1:val2;

}

[Garfield]

> Pass that array to atoi() to get an integer.

Or, you could do the fgets and sscanf combo to get an int. It would look something like this:

char line[50];
int num;

fgets(line, sizeof(line), stdin);
sscanf(line, "%d", &num);

I prefer this. But, it is your choice.

[Troll_King]

fgets and sscanf is a good choice. In addition you can also validate the return value of sscanf to see if the user input is appropriate for the data type.