swap.c

#include <stdio.h> 

void swap(int *x, int *y)  //defining function called swap which swaps using pointers showing that you can
// access data outside of the scope of the current run time scope. 
{ 
    int z = *x; 
    *x = *y; 
    *y = z; 
} 


int main() 
{ 
    int a = 45, b = 35; 
    printf("Before Swap\n"); 
    printf("a = %d b = %d\n",a,b); 

    swap(&a, &b); 
     

    printf("After Swap with pass by reference\n"); 
    printf("a = %d b = %d\n",a,b); 
    return 0; 
} 

// #include <stdio.h>  //standard input output built into c library 

// typedef int number; 

//  int main() { 

//    number c; 
//    printf( "Enter a value :"); 
//    fflush(stdout);  //ECLIPSE BUG 
//    c = getchar( ); 

//    printf( "\nYou entered: "); 
//    putchar( c ); 

//    return 0; 
// } 

//STRING 
//READ/WRITE using get and put 
// #include <stdio.h> 
// int main( ) { 

//    char str[100];       //char array STRING used as buffer 

//    printf( "Enter a value :"); 
//    fflush(stdout);  //ECLIPSE BUG 
//    gets( str ); 

//    printf( "\nYou entered: "); 
//    puts( str ); 

//    return 0; 
// } 


//You define type of I/O 
//scanf and printf 

//reading two items a string and int 
// #include <stdio.h> 
// int main( ) { 

//    char str[100]; 
//    int i; 

//    printf( "Enter a value :"); 
//    fflush(stdout);  //ECLIPSE BUG 
//    scanf("%s %d", str, &i); 

//    printf( "\nYou entered: %s %d ", str, i); 

//    return 0; 
// }