Could someone explain why this happens

Hi everyone

I was fiddling with some code ln and came across a dilemma ,here is the code

Code:

# include <stdio.h>
# include <conio.c>

/********************************** FUNCTION PROTOTYPES ********************/

int test(void);

/********************************** BEGIN MAIN  ****************************/

int main(int argv, char *argc[])
{
 int number;
 printf("Enter a number:");
 scanf("%d",&number);
 switch (number){
                 case (1):
                         test();
                 break;
                 }

     system("PAUSE");
      return 0;
}

/********************************** FUNCTION ******************************/

int test(void)
{
int f;
char name_test[20];

clrscr();
printf("Program is here");
//scanf("%d",&f);
gets(name_test);
 printf(name_test);
 return 0;
 }

ok so whats the problem, well if i run this program as is the gets function is never called or (skipped) so i never get to input some text.
I found that if i put a scanf function just before the gets function the program halts and allows me to enter input into the char array.
I found tht it was the switch command that was creating all this hassle and i was just wondering why?

Thanx for your help.

Don't mix scanf and gets, the newline that scanf tends to leave in the input stream immediately satisfies gets and you never get a chance to enter more data. You shouldn't be using gets anyway, there's no way to make it safe. Try this instead:

Code:

/* Read the data then ignore a single character, presumably the newline */
scanf("%d%*c",&number);

then

Code:

/* Use fgets to get the name */
fgets(name_test, sizeof (name_test), stdin);

Hi

ok i just tried to replace gets with fgets and when i run the program with the scanf function remed out it still skips the fgets function and doesnt allow me to enter the input from stdin.

Thanx

Code:

# include <stdio.h>
# include <conio.c>

/********************************** FUNCTION PROTOTYPES ********************/

int test(void);

/********************************** BEGIN MAIN  ****************************/

int main(int argv, char *argc[])
{
 int number;
 printf("Enter a number:");
 scanf("%d",&number);
 switch (number){
                 case (1):
                         test();
                 break;
                 }

     system("PAUSE");
      return 0;
}

/********************************** FUNCTION ******************************/

int test(void)
{
int f;
char name_test[20];

clrscr();
printf("Program is here");
//scanf("%d",&f);    /*i dont want to use this to pause prog flow
fgets(name_test,20,stdin);                   /*MODIFIED LINE*/
 printf(name_test);
 return 0;
 }

Thanx Salem

much appreciated.