Chapter 22.4 Answers

2.4-2

/*

* Calculate and display the sum of two input variables.

* Extra comments have been added to explain each line.

* (One wouldn’t normally have so many comments.)

*/

#include <.h> /* define standard I/O */

int main(void) /* start of main program */

{

int first, second; /* two input variables */

printf(“Enter two integers: “); /* prompt for input */

scanf(“%d%d”, &first, &second); /* get the input */

/* echo the input and display the sum, all in one line: */

printf(“%d + %d = %d\n”, first, second, first + second);

return(0); /* return to the O/S */

}

2.4-P1

#include <.h>

int main(void)

{

char mychar; /* input character */

float myfloat; /* input floating-point number */

printf(“Enter a character and a floating-point number: “);

scanf(“%c%f”, &mychar, &myfloat);

printf(“You entered ‘%c’ and %f\n”, mychar, myfloat);

return(0);

}