Standard Inputs

scanf() Function

    scanf() function reads data from a standard input device into arguments specified by the format string.


            scanf(format string, arguments)
Eg:-

/* Input through the keyboard */
#include <stdio.h>
#include <conio.h>
int main()
{
         int x,y,sum;
         printf("Enter an Integer:");
         scanf("%d",&x);
         printf("Enter another:");
         scanf("%d",&y);
         sum = x + y ;
         printf("sum =%d \n",sum);
}


/* Floating point Numbers */
#include <stdio.h>
#include <conio.h>
int main()
{
        float x,y,sum;
        printf("Enter a number:");
        scanf("%f",&x);
        printf("Enter another:");
        scanf("%f",&y);
        sum = x + y ;
        printf("sum =%.2f \n",sum);
}


/* Employee Data */
#include <stdio.h>
#include <conio.h>
int main()
{
          int empnum;
          char name[10];
          int dd, mm , yyyy;
          float salary;
          printf("Enter employee number:");
          scanf("%d",&empnum);
          printf("Enter name :");
          scanf("%10s", &name);
          printf("Enter date dd/mm/yyyy :");
          scanf("%2d %2d %4d", &dd, &mm, &yyyy);
          printf("Enter salary :");
          scanf("%f",&salary);
          printf("\n");`
          printf("Emp Num :%d \n", empnum);
          printf("Name :%s\n", name);
          printf("Date of employment :%d%c%d%c%d\n", dd,'/',mm,'/', yyyy);
          printf("Salary :%7.2f\n",salary);
}

Reading a character

getc()

getc() is a macro that reads one character from a stream.

getchar()

getchar() is a macro that gets a character from stdin. It returns the next character on the input stream stdin.

/* Reading a character from the keyboard */
#include <stdio.h>
int main()
{
          char ch;
          printf("Enter a character:");
          ch = getc(stdin);
          printf("You have entered the character %c\n",ch);
}

Reading a String

gets() Function - Reads a string from a stdin.

/* Reading a string from the keyboard */
#include <stdio.h>
int main()
{
         char string[80];
         printf("Enter a word:");
         gets(string);
         printf("You have entered %s\n",string);
}