Question

NOTE: ALL C PROGRAMS MUST BE DONE IN UNIX SYSTEM WITH VI EDITOR

1. Write a program that asks the user to enter a U.S. dollar amount and then shows how to pay that amount using the smallest number of $20, $10, $5 and $1 bills. Save the file as

dollarAmountToNotesFirstinitialLastname.c

Sample output:

Enter a dollar amount: 93

$20 bills: 4

$10 bills: 1

$5 bills: 0

$1 bills: 3

Hint: Divide the amount by 20 to determine the number of $20 bills needed, and then reduce the amount by the total value of the $20 bills. Repeat for the other bill sizes. Be sure to use integer values throughout, not floating-point numbers.

2. Write the following C program: celsius2fahrenheit should print a conversion table from Celsius to Fahrenheit, from 0 to +100 degrees Celsius, in steps of 5 degrees. Save the file ascelsius2FahrenheitaFirstinitialLastnam.c

Sample output:

Celsius                                          Fahrenheit

-----------------                                 -----------------    

0                                                    32

5                                                    41

10                                                  50

15                                                  59

20                                                  68

25                                                  77

30                                                  86

35                                                  95

40                                                  104

45                                                  113

50                                                  122

55                                                   131

60                                                  140

65                                                   149

70                                                   158

75                                                  167

80                                                   176

85                                                  185

90                                                   194

95                                                    203

100                                                  212

Hint: This program should be written exactly as the way it is written in C++ except the Input/Output part. You will need to use a for loop to accomplish this. Remember the control variable in the “for” statement must be declared outside of the for loop.

I need this written in a normal C program, not C++

Answer 1

#include <stdio.h>

int main() {
    int n;
    printf("Enter a dollar amount: ");
    scanf("%d", &n);
    printf("$20 bills: %d\n", n / 20);
    n %= 20;
    printf("$10 bills: %d\n", n / 10);
    n %= 10;
    printf("$5 bills: %d\n", n / 5);
    n %= 5;
    printf("$1 bills: %d\n", n);
    return 0;
}

#include <stdio.h>

int main() {
    double c;
    int f;
    printf("Fahrenheit\t\tCelsius\n");
    f = 100;
    while (f <= 400) {
        c = (f - 32) / 1.8;
        printf("  %3d\t\t\t%lf\n", f, c);
        f++;
    }
    return 0;
}