Can u C !?!?!?!?!?!?!

Code1:

Program for printing hello message

#include<conio.h>

#include<stdio.h>

main()

{

Printf(“hello”);

}

Code2: program for constant’s

#include<stdio.h>

main()

{

const int num=12;

num++;  //cannot modify the constant object

 }

Code3: various datatypes

#include<stdio.h>

Main()

{

int ht,wt;

char ch=’a’;

float=3.14;

}

Code4: program to declare a variable and initialize it

#include<stdio.h>

Main()

{

int a=0; // a is declared here

a is initialized with 0

printf(“%d”,a);

}

Code5: Addition of two number’s

#include<stdio.h>

main()

{

int  a,b,c;

printf(“enter two number’s”);

scanf(“%d%d”,&a,&b);

c=a+b;

printf(“%d”,c);

}

Code6: code for addition,subtraction,multiplication,division

#include<stdio.h>

main()

{

int a,b,sum,add,sub,mul,div;

printf(“enter a,b values”);

scanf(“%d%d,&a,&b);

sum=a+b;

sub=a-b;

mul=a*b;

div=a/b;

printf(“%d%d%d%d”,sum,sub,mul,div);

}

Code7:program for simple interest (PTR/100)

#include<stdio.h>

main()

{

int p,t,r,si;

printf(“enter the values p,t,r values”);

scanf(“%d%d%d”,&p,&t,&r);

si=(p*t*r)/100;

printf(“%d”,si);

}

Code8: reciprocal of a number

#include<stdio.h>

main()

{

float f,z;

printf(“Enter a value”);

scanf(“%f”,&f);

z=1/f;

printf(“%f”,z);

}

Code9: Arithmetic Operator

#include <stdio.h>

int main(){

    int a=9,b=4,c;

    c=a+b;

    printf("a+b=%d\n",c);

    c=a-b;

    printf("a-b=%d\n",c);

    c=a*b;

    printf("a*b=%d\n",c);

    c=a/b;

    printf("a/b=%d\n",c);

    c=a%b;

    printf("Remainder when a divided by b=%d\n",c);

    return 0;

}

}

Code10:Relational Operator

main()

{

        int     x = 3;

        int     y = 4;

        printf("Value of %d > %d is %d\n",x,y,x>y);

        printf("Value of %d >= %d is %d\n",x,y,x>=y);

        printf("Value of %d <= %d is %d\n",x,y,x<=y);

        printf("Value of %d < %d is %d\n",x,y,x<y);

}

Code11:Assignment Operator

main()

{

   int a = 21;

   int c ;

  c =  a;

   printf("Line 1 - =  Operator Example, Value of c = %d\n", c );

c +=  a;

   printf("Line 2 - += Operator Example, Value of c = %d\n", c );

c -=  a;

   printf("Line 3 - -= Operator Example, Value of c = %d\n", c );

c *=  a;

   printf("Line 4 - *= Operator Example, Value of c = %d\n", c );

c /=  a;

   printf("Line 5 - /= Operator Example, Value of c = %d\n", c );

}

Code12: Logical Operator

main()

{

   int a = 21;

   int b = 10;

   int c ;

if ( a && b )

   {

      printf("Line 6 - Condition is true\n" );

   }

   if ( a || b )

   {

      printf("Line 7 - Condition is true\n" );

   }

   /* Again lets change the value of  a and b */

   a = 0;

   b = 10;

   if ( a && b )

   {

      printf("Line 8 - Condition is true\n" );

   }

   else

   {

      printf("Line 8 - Condition is not true\n" );

   }

   if ( !(a && b) )

   {

      printf("Line 9 - Condition is true\n" );

   }

}

Code13:Bitwise Operator

main()

{

   unsigned int a = 60;           /* 60 = 0011 1100 */  

   unsigned int b = 13;           /* 13 = 0000 1101 */

   int c = 0;           

   c = a & b;       /* 12 = 0000 1100 */ 

   printf("Line 1 - Value of c is %d\n", c );

   c = a | b;       /* 61 = 0011 1101 */

   printf("Line 2 - Value of c is %d\n", c );

   c = a ^ b;       /* 49 = 0011 0001 */

   printf("Line 3 - Value of c is %d\n", c );

   c = ~a;          /*-61 = 1100 0011 */

   printf("Line 4 - Value of c is %d\n", c );

   c = a << 2;     /* 240 = 1111 0000 */

   printf("Line 5 - Value of c is %d\n", c );

   c = a >> 2;     /* 15 = 0000 1111 */

   printf("Line 6 - Value of c is %d\n", c );

}

Code14:sizeof

#include <stdio.h>

int main(){

    int a;

    float b;

    double c;

    char d;

    printf("Size of int=%d bytes\n",sizeof(a));

    printf("Size of float=%d bytes\n",sizeof(b));

    printf("Size of double=%d bytes\n",sizeof(c));

    printf("Size of char=%d byte\n",sizeof(d));

}

Code15: Conditional operator

int a=10, b=20, c;
c = a > b ? a : b; // if a>b "execute" a, else b

Code16: ASCII value

#include<stdio.h>

Main()

{

Char ch=’a’;

Printf(“%d%c”,ch,ch);

}

Code17: Escape Character’s

#include<stdio.h>

Main()

{

Printf(“a\tb”);

Printf(“a\nb”);

Printf(“a\\b”);

Printf(“a\vb”);

Printf(“a\ab”);

Printf(“a\bb”);

Printf(“a\?b”);

Printf(“a\rb”);

}

 Code18: if
statement

#include<stdio.h>

main()

{

Int i=14;

If(i>18)

Printf(“eligible for voting”);

}

Another example

#include<stdio.h>

main()

{

int a=5,b=5;

if((a-b)==0)

{

printf(“ a and b are equal”);

}

Sleep(1000);

}

Code 19: if-else statement

#include<stdio.h>

main()

{

int a=20,b=10;

if(a>b)

{

Printf(“a is big”);

}

else

{

printf(“ b is big”);

}

}

Code 20: if-elseif  ladder

#include<stdio.h>

main()

{

int n=4;

if(n==1)

{

printf(“n is one”);

elseif(n==2)

{

printf(“n is two”);

}

elseif(n==3)

{

printf(“n is three”);

}

elseif(n==4)

{

printf(“n is four”);

}

else

{

printf(“No match”);

}

}

Code21: switch statement

#include<stdio.h>

main()

{

int n =4;

switch(n)

{

case1:

printf(“red”);

break;

case2:

printf(“blue”);

break;

case3:

printf(“orange”);

break;

case4:

printf(“black”);

break;

default:

printf(“No match”);

}

}

Example without break:

#include<stdio.h>

main()

{

int n =1;

switch(n)

{

case1:

printf(“red”);

case2:

printf(“blue”);

case3:

printf(“orange”);

case4:

printf(“black”);

default:

printf(“No match”);

}

}

Code22:while loop

#include<stdio.h>

main()

{

int i;

while(i<10)

{

Printf(“%d”,i);

i++;

}

}

Code23: do while loop

#include<stdio.h>

main()

{

int i;

do

{

printf(“%d”,i);

i++;

}while(i<10);

}

Code 24: for loop

#include<stdio.h>

main()

{

for(int i=0;i<10;i++)

{

printf(“%d”,i);

}

}

Code25: break

#include<stdio.h>

main()

{

for(int i=0;i<10;i++)

{

printf(“%d”,i);

if(i==5)

break;

}

}

Code26:continue

#include<stdio.h>

main()

{

for(int i=0;i<10;i++)

{

printf(“%d”,i);

if(i==5)

continue;

}

}

Code27: (ax+b)/(ax-b)

#include<stdio.h>

Void main()

{

Int a ,x,b,z;

Printf(“Enter a,x,b values”);

Z=(a*x+b)/(a*x-b);

Printf(“%d”,z);

}

Code 28: Absolute value of a number

#include<stdio.h>
#include<conio.h>
   void main()
     {
    int num;
    printf("\n Enter a Number : ");
    scanf("%d",&num);
    if(num<0)
    {
       num= (-1)*num;
    }
    printf("\n The Abosolute Value is %d",num);
   

    }

Code 29: Program for reverse of a number

#include<stdio.h>

int main(){

    int num,r,reverse=0;

    printf("Enter any number: ");

    scanf("%d",&num);

    while(num){

         r=num%10;

         reverse=reverse*10+r;

         num=num/10;

    }

    printf("Reversed of number: %d",reverse);

    return 0;

}

Code 30: swap two numbers

#include<stdio.h>

int main(){

 int a=5,b=10;

//process one

    a=b+a;

    b=a-b;

    a=a-b;

    printf("a= %d  b=  %d",a,b);

}

Code:31

Conversion from uppercase to lower case using c program

#include<stdio.h>
#include<string.h>

int main(){
char str[20];
int i;
printf("Enter any string->");
scanf("%s",&str);
printf("The string is->%s",str);
for(i=0;i<=strlen(str);i++){
if(str[i]>=65&&str[i]<=90)
str[i]=str[i]+32;
}
printf("\nThe string in uppercase is->%s",str);
return 0;
}

ASCII value of 'A' is 65 while 'a' is 97. Difference between them is 97 – 65 = 32

So if we will add 32 in the ASCII value of 'A' then it will be 'a' and if will we subtract 32 in ASCII value of 'a' it will be 'A'. It is true for all alphabets.

In general rule:

Upper case character = Lower case character – 32

Lower case character = Upper case character + 32

Code 32: Even/Odd number

#include<stdio.h>

Main()

{

Int n;

Printf(“Enter n value”);

scanf(“%d”,n)

if(n%2==0)

{

Printf(“even”);

}

Else

{

Printf(“Odd”);

}

}

Code 33:Multiplication table

Main()

{

Int I,n,c=0;

Printf(“enter any number”);

Scanf(“%d”,&n);

I=1;

while(i<=10)

{

Printf(“%d * %d= %d\n”,n,I,n*i);

I++;

}

}

Code 34:Program to print even number till range

Main()

{

Int I,n;

Printf(“Enter nay number”);

Scanf(“%d”,&n);

For(i=2;i<=n;i+=2)

Printf(“%d”,i);

}

Code 35:leap year or not

Main()

{

Int year;

Printf(“Enter year”);

Scanf(“%d”,&year);

If(year%==0)

Printf(“Leap year”);

Else

Printf(“Not a Leap year”);

}

Code 36:

Program to check vowel or not

#include <stdio.h>

int main()

{

  char ch;

  printf("Enter a character\n");

  scanf("%c", &ch);

  if (ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' || ch == 'I' || ch =='o' || ch=='O' || ch == 'u' || ch == 'U')

    printf("%c is a vowel.\n", ch);

  else

    printf("%c is not a vowel.\n", ch);

}

Code 37: program for sum.avg of two number’s

#include<stdio.h>
main()
{
int a,b,sum,diff,avg;
printf(“\nEnter two integers: “);
scanf(“%d%d”,&a,&b);
sum=a+b;
diff=a-b;
avg=(a+b)/2;
printf(“\nSum= %d\nDifference= %d\nAverage= %d\n”,sum,diff,avg);
}

Code 38: sum of digits of a number

#include<stdio.h>
main()
{
int num,i,remainder,sum=0;
printf(“\nEnter the number: “);
scanf(“%d”,&num);
while(num>0)
{
remainder=num%10;
sum+=remainder;
num/=10;
}
printf(“\nSum of digits: %d\n\n”,sum);
}

Code 39: To find area and circumference of circle

#include<stdio.h>

int main()

{

int rad;

float PI=3.14,area,ci;

printf("nEnter radius of circle: ");

scanf("%d",&rad);

area = PI * rad * rad;

printf("nArea of circle : %f ",area);

ci = 2 * PI * rad;

printf("nCircumference : %f ",ci);

}

Code40 : strlen()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str[30]="C PROGRAMMING";            

    clrscr();

    printf("\n\nstr : %s\n\n",str);

    printf("\nLength of the string, strlen(str) is %d\n",strlen(str));

    getch();

    return 0;

}

Code41 : strlwr()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str[30]="C PROGRAMMING";          

    clrscr();

    printf("\n\nstr : %s\n\n",str);

    printf("strlwr(str) : %s\n",strlwr(str));

    getch();

    return 0;

}

Code42 : strupr()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str[30]="C Programming";          

    clrscr();

    printf("\n\nstr : %s\n\n",str);

    printf("strupr(str) : %s\n",strupr(str));

    getch();  

    return 0;

}

Code42: strcat()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str1[25]="I LIKE ";

    char str2[15]="C PROGRAMMIG";        

    clrscr();

    printf("\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);

    printf("\n\nstrcat(str1,str2) : %s\n\n",strcat(str1,str2));

    printf("\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);

    getch();

    return 0;

}

Code44 : strncat()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str1[25]="I LIKE ";

    char str2[13]="C PROGRAMMIG";        

    clrscr();

    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);

    printf("\n\nstrncat(str1,str2,5) : %s\n\n",strncat(str1,str2,5));

    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);

    getch();

    return 0;

}

Code45: strcpy()

 #include  <stdio.h>

 #include  <conio.h>

int  main()

{

    char str1[15]="I LIKE ";

    char str2[15]="C PROGRAMMIG";

    clrscr();

    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);

    strcpy(str1,str2);

    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);

    getch();

    return 0;

}

Code46: strncpy()

 #include  <stdio.h>

 #include  <conio.h>

int  main()

{

    char str1[25]="I LIKE ";

    char str2[15]="C PROGRAMMIG";

    clrscr();

    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);

    strncpy(str1,str2,4);

    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);

    getch();

    return 0;

}

   

Code47: strcmp()

 #include  <stdio.h>

 #include  <conio.h>

int main()

{  

    char str1[]="I LIKE";

    char str2[]="C Expert";

    int i;       

    clrscr();

    i=strcmp(str1,str2);

    if(i==0)      

        printf("\n\nstr1 and str2 are identical");

    else if(i<0)   

        printf("\n\nstr1< str2");

    else

        printf("\n\nstr1< str2");

    getch();

    return 0;

}

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