Explorer Toolbox mono File Edit View Git Project 3-2 Week 12 exercise cp.c X Week 12 exercise cp 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 48°F Cloudy #include Bint main() { int END VAL= 0; double miles, gallons, mpg; while (1) { printf("How many miles did you drive? Enter to quit: "); } else { scans ("%lf", &miles); if (miles ! END VAL) ( printf("How many gallons of gas did you use? "); scans("%lf", &gallons); mpg = miles / gallons; printf("Your mpg is %.21f", mpg); printf("\n"); } Build Debug Test Analyze Tools Extensions Window Help Debug x86 ► Local Windows Debugger & | return 0; Error List (Global Scope) printf("End of program"); break; X 2 Errors 2 Warnings Entire Solution Description Code AC6001 Using uninitialized memory 'miles'. ▷ C6001 Using uninitialized memory 'gallons'. LNK2019 unresolved external symbol_scans referenced in function _main XLNK1120 1 unresolved externals ‒‒ ‒‒ Q Search main() 0 Messages Build + IntelliSense a Search (Ctrl+Q) e- = a Project File Week 12 exercise cp Week 12 exercise... 10 Week 12 exercise cp Week 12 exercise... 13 Week 12 exercise cp Week 12 exercise... 1 Week 12 exercise cp Week 12 exercise... 1 P Search Error List Line Suppression State Week 1...cise cp Solution Explorer Sign in Search Solution Explorer (Ctrl+;) D D Live Share - OX P Solution Week 12 exercise cp' (1 of 1 project) Week 12 exercise cp References External Dependencies Header Files Resource Files Source Files ▷ Week 12 exercise cp.c Solution Explorer Git Changes Properties () O ADMIN 11:29 PM 11/26/2022

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Please fix errors thank you.

### Code Analysis and Debugging in C Programming

#### Code Explanation

This program is designed to calculate miles per gallon (mpg) based on user input in C. The user is prompted to enter the number of miles driven and the gallons of gas used. The program then calculates and displays the mpg.

```c
#include <stdio.h>

int main() {
    int END_VAL = 0;
    double miles, gallons, mpg;
    while (1) {
        printf("How many miles did you drive? Enter 0 to quit: ");
        scanf("%lf", &miles);
        if (miles != END_VAL) {
            printf("How many gallons of gas did you use? ");
            scanf("%lf", &gallons);
            mpg = miles / gallons;
            printf("Your mpg is %.21f", mpg);
            printf("\n");
        } else {
            printf("End of program");
            break;
        }
    }
    return 0;
}
```

#### Error List and Warnings

1. **C6001: Using uninitialized memory 'miles'.** (Line 10)
   - The variable 'miles' is used without being initialized.

2. **C6001: Using uninitialized memory 'gallons'.** (Line 13)
   - The variable 'gallons' is used without being initialized.

3. **LNK2019: unresolved external symbol _scans referenced in function _main** (Line 1)
   - This error indicates a typo in the function call. 'scanf' should be used instead of 'scans'.

4. **LNK1120: 1 unresolved externals** (Line 1)
   - This error refers to unresolved symbols resulting from the above issue.

#### Solution Suggestions

- Ensure that the function call is correctly written as `scanf` instead of `scans`.
- Always initialize variables before use. Both `miles` and `gallons` should be given initial values even though they are intended to receive input.
- Check all syntax and ensure all standard functions are called correctly to avoid linker errors.

This is a fundamental exercise in debugging, ensuring you understand both syntax correctness and memory management in C programming.
Transcribed Image Text:### Code Analysis and Debugging in C Programming #### Code Explanation This program is designed to calculate miles per gallon (mpg) based on user input in C. The user is prompted to enter the number of miles driven and the gallons of gas used. The program then calculates and displays the mpg. ```c #include <stdio.h> int main() { int END_VAL = 0; double miles, gallons, mpg; while (1) { printf("How many miles did you drive? Enter 0 to quit: "); scanf("%lf", &miles); if (miles != END_VAL) { printf("How many gallons of gas did you use? "); scanf("%lf", &gallons); mpg = miles / gallons; printf("Your mpg is %.21f", mpg); printf("\n"); } else { printf("End of program"); break; } } return 0; } ``` #### Error List and Warnings 1. **C6001: Using uninitialized memory 'miles'.** (Line 10) - The variable 'miles' is used without being initialized. 2. **C6001: Using uninitialized memory 'gallons'.** (Line 13) - The variable 'gallons' is used without being initialized. 3. **LNK2019: unresolved external symbol _scans referenced in function _main** (Line 1) - This error indicates a typo in the function call. 'scanf' should be used instead of 'scans'. 4. **LNK1120: 1 unresolved externals** (Line 1) - This error refers to unresolved symbols resulting from the above issue. #### Solution Suggestions - Ensure that the function call is correctly written as `scanf` instead of `scans`. - Always initialize variables before use. Both `miles` and `gallons` should be given initial values even though they are intended to receive input. - Check all syntax and ensure all standard functions are called correctly to avoid linker errors. This is a fundamental exercise in debugging, ensuring you understand both syntax correctness and memory management in C programming.
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