How to write a C program to evaluate student grades using a switch statement and how to compile and improve it?

This C program uses a switch statement to evaluate a student's grade. Here's how to compile it and some improvements for the code: Step 1: Compile the program. To compile this C code, you'll need a C compiler (like GCC). • Save the code in a file, for example, grade_evaluator.c. • Open a terminal or command prompt. • Navigate to the directory where you saved the file. • Compile the program using the command: gcc grade_evaluator.c -o grade_evaluator • Run the executable: ./grade_evaluator (or grade_evaluator.exe on Windows). Step 2: Correct typographical errors. There are a few spelling mistakes in your printf statements: • Line 12: printf(" done!"); should be printf(" done!"); • Line 18: printf("!"); appears to be a typo. It should likely be printf("!"); or printf("!"); • Line 30: printf(" Grade."); should be printf(" Grade."); Step 3: Improve input handling. To ensure scanf correctly reads the character and doesn't pick up a leftover newline character from the input buffer, add a space before the %c format specifier: • Line 6: Change scanf("%c",&grade); to scanf(" %c",&grade); Step 4: Handle case sensitivity. Your switch statement only checks for uppercase grades ('A', 'B', etc.). If a user enters a lowercase letter (e.g., 'a'), it will fall into the default case. To make it case-insensitive, you can convert the input character to uppercase (or lowercase) using toupper() from the <ctype.h> library before the switch statement. • Add #include <ctype.h> at the top of your file. • After scanf(" %c",&grade);, add grade = toupper(grade); 3 done, 2 left today. You're making progress.