Saturday, January 30, 2010

CHAP 14[A]a Rainbow problem

The information about colors is to be stored in bits of a char variable called color. The bit number 0 to 6, each represent 7 colors of a rainbow, i.e. bit 0 represents violet, 1 represents indigo, and so on. Write a program that asks the user to enter a number and based on this number it reports which colors in the rainbow does the number represents.

Colours of rainbow are in order of : Red, Orange, Yellow, Green, Blue, Indigo, Violet

void main()
{
int i,input,mask,j;
printf("\nKey in a number\n");
scanf("%d",&input);

for(i=6;i>=0;i--)
{
mask=1< j=mask&input;
if(i==6&&j==64)
printf("Red");
if(i==5&&j==32)
printf(" Orange");
if(i==4&&j==16)
printf(" Yellow");
if(i==3&&j==8)
printf(" Green");
if(i==2&&j==4)
printf(" Blue");
if(i==1&&j==2)
printf(" Indigo");
if(i==0&&j==1)
printf(" Violet");

}
}
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5 comments:

  1. sweetyradheyDecember 15, 2011 at 9:08 AM

    there ia a mistake instead of using , you typed < operator in mask=1<j=mask&output.it must be mask=1,j=mask&output

    ReplyDelete
  2. UnknownJune 17, 2014 at 11:25 PM

    #include
    mask=pow(2,i),j=mask&input;
    mistake posted by above person is correct but one more thing to be considered is mask should be equal to pow(2,i) and math.h should be included else the output is blank

    ReplyDelete
  3. UnknownOctober 12, 2020 at 9:42 AM

    I'm glad I did it correct yours and mine code almost same

    ReplyDelete
  4. UnknownApril 25, 2021 at 4:08 AM

    #include
    color(int );
    int main()
    {
    int t;
    printf("enter a number\n");
    scanf("%d",&t);
    printf("it contains ");
    color(t);

    }
    color(int a)
    {
    if(a&1)printf("violet ");
    if(a&2)printf("indigo ");
    if(a&4)printf("blue ");
    if(a&8)printf("green ");
    if(a&16)printf("yellow ");
    if(a&32)printf("orange ");
    if(a&64)printf("red ");

    }

    ReplyDelete
  5. UnknownJune 5, 2021 at 2:56 AM

    #include
    #include
    int main()
    {
    int bit_number;
    printf("Enter the bit number:- ");
    scanf("%d" ,&bit_number);
    int value=pow(2,bit_number);
    switch(value)
    {
    case 1:
    printf("Violet");
    break;
    case 2:
    printf("Indigo");
    break;
    case 4:
    printf("Blue");
    break;
    case 8:
    printf("Green");
    break;
    case 16:
    printf("Yellow");
    break;
    case 32:
    printf("Orange");
    break;
    case 64:
    printf("Red");
    break;
    }
    return 0;
    }

    ReplyDelete

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