//Assignment 5 Structured programming
//Question 1
#include <stdio.h>
#include <stdlib.h>
int main()
{
    char grade;
    printf("Enter grade: ");
    scanf("%c", &grade);
    switch(grade)
    {
        case 'A':
        case 'a':
            printf("Excellent");
            break;
        case 'B':
        case 'b':
            printf("Very good");
            break;
        case 'C':
        case 'c':
            printf("Good");
            break;
        case 'D':
        case 'd':
            printf("Poor");
            break;
        case 'F':
        case 'f':
            printf("Failed");
            break;
        default:
            printf("Invalid");
    }
}

//Question 2
#include <stdio.h>
#include <stdlib.h>
int main()
{
    int month;
    printf("Enter number of month: ");
    scanf("%d", &month);
    switch (month)
    {
        case 1:
            printf("January: 31 days");
            break;
        case 2:
            printf("February: 28 days");
            break;
        case 3:
            printf("March: 31 days");
            break;
        case 4:
            printf("April: 30 days");
            break;
        case 5:
            printf("May: 31 days");
            break;
        case 6:
            printf("June: 30 days");
            break;
        case 7:
            printf("July: 31 days");
            break;
        case 8:
            printf("August: 31 days");
            break;
        case 9:
            printf("September: 30 days");
            break;
        case 10:
            printf("October: 31 days");
            break;
        case 11:
            printf("November: 30 days");
            break;
        case 12:
            printf("December: 31 days");
            break;
        default:
            printf("Invalid number");
    }
}

//Question 3
#include <stdio.h>
#include <stdlib.h>
int main()
{
    char color;
    printf("Enter color: ");
    scanf("%c", &color);
    switch (color)
    {
        case 'o':
        case 'O':
            printf("ammonia");
        case 'b':
        case 'B':
            printf("carbon monoxide");
        case 'y':
        case 'Y':
            printf("hydrogen");
        case 'g':
        case 'G':
            printf("oxygen");
    }
}