C-programming Reading input

C - Input & Output

printf() ,scanf(),gets(),getchar(),puts() and putchar()

scanf()  This function reads formatted input from standard input (keyboard) 
printf()  This function sends formatted output to the standard output (screen)

Example 1  C Integer Input/Output

#include <stdio.h>
int main()
{
    int n;
    printf("Enter an integer: ");
    scanf("%d",&n);             //Reads intiger from keyboard to variable n
    printf("Number = %d",n);      //Prints the read value in output screen
    return 0;
}

getchar()  - This function is used to read single character 

putchar() -This function is used to print single character

Example 2  -getchar(),putchar()

#include <stdio.h>

int main ()
{
   char c;
 
   printf("Enter character: ");
   c = getchar();
 
   printf("Character entered: ");
   putchar(c);

   return(0);
}

gets()- This function is used to read a string

puts()- This function is used to print a string

Example 3- gets(),puts()

#include <stdio.h>

int main()
{
   char str[50];

   printf("Enter a string : ");
   gets(str);

   printf("You entered :");
   puts(str);
   return(0);
}