Originally created by Jerrett Longworth and Idel Martinez in Spring 2021.
This is important to get right. Functions are the base of every program, and knowing what your variables are doing in them is crucial.
_____ add_everything(_____ num1, int num2)
{
return num1 + num2;
}
int main(void)
{
int x, y;
printf("%_____\n", add_everything(10, 5));
x = 20;
y = 15;
printf("%d\n", add_everything(x, y));
return 0;
}
floaty_float
after the execution of this program, assuming the user enters
5
?void get_value(float f)
{
("%f", &f);
scanf= f + 0.5;
f }
int main(void)
{
float floaty_float;
(floaty_float);
get_value
("%f\n", floaty_float);
printf
return 0;
}
floaty_float
? Assume, again, that the user enters
5
.float get_value(void)
{
float f;
("%f", &f);
scanfreturn f + 15.5;
}
int main(void)
{
float floaty_float;
= get_value();
floaty_float
("%f\n", floaty_float);
printf
return 0;
}
main
print in lines 10, 12, and 14?void add_num(int x, int y)
{
x = x + y;
}
int main(void)
{
int x = 10;
printf("At first x was %d\n", x);
add_num(20, 10);
printf("Now x is %d\n", x);
add_num(x, 10);
printf("While x is now %d\n", x);
return 0;
}
main
print in lines 12, 14, and 16?int x;
void add_num(int y)
{
x = x + y;
}
int main(void)
{
x = 10;
printf("At first x was %d\n", x);
add_num(20);
printf("Now x is %d\n", x);
add_num(10);
printf("While x is now %d\n", x);
return 0;
}
// Return the slope of two points.
double slope(float x1, float y1, float x2, float y2)
{
// This is the function body. Your code goes here.
}
int main(void)
{
double point_x1 = 10;
double point_x2 = 40.55;
double point_y1 = 98.122321;
double point_y2 = 12;
("The first point is: (%lf.2, %lf.2)\n" point_x1, point_y1);
printf("The second point is: (%lf.2, %lf.2)\n", point_x2, point_y2);
printf("The slope of the points is %lf\n", slope(point_x1, point_y1, point_x2, point_y2));
printf
return 0;
}
sqrt()
function provided by the
math.h
library.)// Return the distance between two points.
double distance_between_points(float x1, float y1, float x2, float y2)
{
// Code goes here.
}
int main(void)
{
double p_x1, p_x2, p_y1, p_y2;
("Please enter the first point\n");
printf("> x: ");
printf("%lf", &p_x1);
scanf("> y: ");
printf("%lf", &p_y1);
scanf
("Please enter the second point\n");
printf("> x: ");
printf("%lf", &p_x2);
scanf("> y: ");
printf("%lf", &p_y2);
scanf
("The distance between these two points is %lf\n", distance_between_points(p_x1, p_y1, p_x2, p_y2));
printf
return 0;
}
mario()
function that prints an m
x n
block using
#
characters.// Example output:
// mario(3, 4) should print:
// ###
// ###
// ###
// ###
// mario(1, 1) should print:
// #
// mario(10, 5) should print:
// ##########
// ##########
// ##########
// ##########
// ##########
void mario(int m, int n)
{
// Your code here
}
int main(void)
{
int m, n;
("Enter a width: ");
printf("%d", &m);
scanf("Enter a height: ");
printf("%d", &n);
scanf
(m, n);
mario
return 0;
}
Fun fact: This problem is based on the one seen in CS50.