I am trying to write the following program with Visual Studio using namespace std. I am a beginner and am not familiar with any other compilers so please show how to write the program on Visual Studio using namespace std.

Write a program that translates a letter grade into a number grade. Letter grades are A, A+, A-, B, B+, B-, C, C+, C-, D, D+, D-, and F. Their numeric values are A=4, B=3, C=2, D=1, and F=0. There is no F+ or F. A + increases the numeric value by 0.3, a decreases it by 0.3. However, an A+ has value 4.0.

Ex: Enter a letter grade: B-

The numeric value is 2.7