tricky c programs with solutions



1.C program to print square and cube of all numbers from 1 to N using a goto statement

2. C program to check whether the number is EVEN or ODD using switch

3. C program to find a number of days in a month using switch case



Solution:
1.#include<stdio.h>

int main()
{
            int count,n;

            printf("Enter the value of N: ");
            scanf("%d",&n);
           
            count=1;
           
            start:
            printf("num: %4d, Square: %4d, Cube: %4d\n",count,(count*count),(count*count*count));
            count++;

            if(count<=n)
                        goto start;

            return 0;
}
2. #include <stdio.h>

int main()
{
    int number;
    
    printf("Enter a positive integer number: ");
    scanf("%d",&number);
    
    switch(number%2)
    {
        case 0:
            printf("%d is an EVEN number.\n",number);
            break;
        case 1:
            printf("%d is an ODD number.\n",number);
            break;
    }
    
    return 0;
}
3. #include <stdio.h>

int main()
{
            int month;
            int days;
           
            printf("Enter month: ");
            scanf("%d",&month);
           
            switch(month)
            {
                        case  4:
                        case  6:
                        case  9:
                        case 11:
                                    days=30;
                                    break;
                        case  1:
                        case  3:
                        case  5:
                        case  7:
                        case  8:
                        case 10:
                        case 12:
                                    days=31;
                                    break;
                                   
                        case 2:
                                    days=28;
                                    break;
                       
                        default:
                                    days=0;
                                    break;            
            }
           
            if(days)
                        printf("Number of days in %d month is: %d\n",month,days);
            else
                        printf("You have entered an invalid month!!!\n");
           
            return 0;}

            

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