C Programming Codes

//Program to read elements of array and print them. #include <stdio.h> int main() { int a[5],i; for(i=0;i<5;i++) //for loop for reading elements of array { printf("Enter the element at %d index:",i); scanf("%d",&a[i]); } for(i=0;i<5;i++) { printf("\nThe element at %d index is :%d",i,a[i]); //for loop for printing elements of array } return 0; }

//Program for size of operator. #include<stdio.h> int main(){ int a=6; printf("size of a:%d",sizeof(a)); return 0; }

//Program for understanding bitwise operators. #include<stdio.h> int main(){ int a=3,b=1; printf("a&b=%d\n",a&b); //Bitwise and(&) //0011 :3 //0001 :1 //-------if we perforn and on above two values //0001 :1 ,Result will be 1. printf("a|b :%d\n",a|b); //Bitwise or(|) //0011:3 //0001:1 //-------if we perform or on above two values //0011:3 ,Result will be 3. printf("a>>b:%d\n",a>>b); //right shift(>>) // 3>>1 // 0011:3 // 0001:1(after shifting to right) printf("a<<b:%d",a<<b); //left shift(<<) //3<<1 //0011:3 //0110:6(after shifting to left) return 0; }

//Program for understanding logical operators. #include<stdio.h> int main(){ int a=6,b=3; printf("a==6 && a>b :%d\n",a==6 && a>b); //In case of and(&&) the result is True(1),if and only if both conditions gets evaluated to True(1). printf("a>b b>a:%d\n",a>b b>a); //In case of or(||) The result is True,if any one condition is True(1) no matter about second condition. printf("!a:%d",!a); //If the value of a is True(1) then the not(!) operator evaluate the value to False(0) and vice versa. return 0; }

//Program for understanding relational operators. #include<stdio.h> int main(){ int a=10,b=9; printf("a==b:%d\n",a==b); // 0:False printf("a!=b:%d\n",a!=b); // 1:True printf("a>b:%d\n",a>b); // 1:True printf("a<b:%d\n",a<b); //0:False printf("a>=b:%d\n",a>=b); //1:True printf("a<=b:%d",a<=b); //0:False return 0; }

//Program for understanding assignment operators. #include<stdio.h> int main(){ int a=10; //a is assigned with a value 10 printf("a:%d\n",a); a+=4; // a=a+6 printf("a:%d\n",a); a-=3; //a=a-3 printf("a:%d\n",a); a*=2; //a=a*2 printf("a:%d\n",a); a/=11; //a=a/11 printf("a:%d\n",a); a%=2; //a=a%2 printf("a:%d\n",a); return 0; }

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//Program for understanding increment and decrement operators. //pre decrement. #include<stdio.h> int main(){ int a=10; int b=--a; //pre decrement:the actual value of a is first decremented by 1 and assigned to b . printf("The value of a:%d and b: %d",a,b); return 0; }

//Program for understanding increment and decrement operators. //post decrement. #include<stdio.h> int main(){ int a=10; int b=a--; //post decrement:the actual value of a is first assigned to b and then the value of a is decremented by 1. printf("The value of a:%d and b: %d",a,b); return 0; }

//Program for understanding increment and decrement operators. //pre increment. #include<stdio.h> int main(){ int a=10; int b=++a; //pre increment:the actual value of a is first incremented by 1 and assigned to b. printf("The value of a:%d and b: %d",a,b); return 0; }

//Program for understanding increment and decrement operators. //post increment. #include<stdio.h> int main(){ int a=10; int b=a++; //post increment:the actual value of a is first assigned to b and next the value of a will be incremented by 1. printf("The value of a:%d and b: %d",a,b); return 0; }

//Program for understanding arithmetic operators. #include<stdio.h> int main(){ int a=10,b=5; printf("Addition of a and b:%d\n",a+b); printf("Subraction of a and b:%d\n",a-b); printf("Multiplication of a and b:%d\n",a*b); printf("Division of a and b:%d\n",a/b); printf("Modulo of a and b:%d",a%b); return 0; }

//Program to print the adress of variable and using that address get the value of that variable. #include<stdio.h> int main(){ int a=10; int *address=&a; printf("Address of variable a: %p\n",&a); printf("Value of a:%d",*address); return 0; }

//Program to print the adress of variable and using that address get the value of that variable. #include<stdio.h> int main(){ int a=10; int *address=&a; int b=5; printf("Address of variable a: %p\n",&a); printf("Value of a:%d",*address); return 0; }

//Guessing a number game in c #include <stdio.h> #include<stdlib.h> #include<time.h> int main() { int number,guess,numguesses=1; srand(time(0)); number=rand()%100+1; do { printf("Guess a number between 1 to 100:"); scanf("%d",&guess); if(guess>number){ printf("Your guess is wrong \nPlease enter lower number\n"); } else if(guess<number){ printf("Your guess is wrong \nPlease enter a greater number\n"); } else{ printf("Congrats! You have guessed it correct\n"); printf("The number of attempts you've taken to guess the correct number is %d times ",numguesses); } numguesses++; } while (guess!=number); return 0; }

//function to calculate factorial #include <stdio.h> int factorial(int); int main() { int n; printf("Enter the number you want to factoriate:"); scanf("%d",&n); printf("Factorial of %d is %d",n,factorial(n)); return 0; } int factorial(int n){ if(n==1 || n==0){ return 1; } return n*factorial(n-1); }

// Password validation using do while loop. #include <stdio.h> int main() { int password; do { printf("Enter the password:"); scanf("%d",&password); }while(password!=1243); printf("Access Granted."); return 0; }

// Program to generate fibonacci series using while loop. #include <stdio.h> int main() { int num, i = 2, isPrime = 1; printf("Enter the number:"); scanf("%d", &num); if (num <= 1) { isPrime = 0; } else { while (i <= num / 2) { if (num % i == 0) { isPrime = 0; break; } i++; } } if(isPrime==1) { printf("%d is a prime number.",num); } else{ printf("%d is not a prime number.",num); } return 0; }