Transferring Control of a Program Unconditionally

Syntax : goto <identifier>;
 keyword transfers the control of a program unconditionally, to the location of a local label specified by <identifier>

Note: The use of goto statement is usually avoided in good programming practice. A program code can be      restructured to avoid goto statement. Do not goto a label inside a repetitive structure or a switch statement.


getchar() is a macro that gets a character from stdin. Note that getchar reads from stdin and is line
buffered; ie. it will not return until you press enter.

getch() reads a single character from the keyboard without echoing to the screen.

getche() reads a single character from keyboard and echoes to the screen.

getc() is a macro that gets one character from a stream. It returns the next character on the given input
stream and increments the stream's file pointer point to the next character.
Declaration        int getc(FILE a Stream);

gotoxy - Positions cursor in a text window
Syntax : gotoxy(int x, int y) If the co-ordinates are invalid, the call to gotoxy is ignored.


/* Larger number*/
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
int main()
{
              int a, b, c, max;
              start:
              printf(“Enter a number : ");
              scanf(“%d”, &a);
              printf(“Enter another : ");
              scanf(“%d”, &b);
              if (a = = b)
              {
                      printf(“\n Please enter two different numbers \n”);
                      gotoxy(5,20);
                      printf(“Press any key to continue ...\n”);
                      getch();
                      goto start;
               }
              else if (a>b)
                      max = a;
              else
                      max = b;
              printf(“\n The larger number is %d\n”, max);
}


/* Weather */
# include <stdio.h>
# include <conio.h>
# define max_temp 35
# define min_temp 25
# define max_humi 30
# define min_humi 15
int main()
{
              float temp, humi;
              printf(“Enter today’s temperature : ”);
              scanf(“%f”, &temp);
              printf(“Enter humidity : ”);
              scanf(“%f”, &humi);
              if (temp > max_temp && humi > max_humi)
                            printf(“\n Today is Hot and humid \n”);
              else if (temp > max_temp && humi < min_humi)
                            printf(“\n Today is Hot and dry \n”);
              else if (temp < min_temp && humi > max_humi)
                            printf(“\n Today is cold and humid \n”);
              else if (temp < min_temp && humi < min_humi)
                            printf(“\n Today is dry and cold \n”);
              else if (temp > max_temp || temp <min_temp || humi > max_humi || humi < min_humi)
                            printf(“\n Weather is not norma l\n”);
              else
                            printf(“\n Weather is normal \n”);
}