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Basic calculator using C programming

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# include < stdio.h > # include < stdlib.h > int main () { // num1 num2 + int num1,num2; char operator; scanf ( " %d %d %c " ,&num1,&num2,&operator); switch (operator) { case ' + ' : printf ( " %d " ,num1+num2); break ; case ' - ' : printf ( " %d " ,num1-num2); break ; case ' * ' : printf ( " %d " ,num1*num2); break ; case ' / ' : if (num2== 0 ) { printf ( " Not divisible by zero " ); break ; } else { printf ( " %d " ,num1/num2); break ; } default : printf ( " invalid " ); } return 0 ; }
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Factorial of consecutively 5 numbers(input)

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import java.util.Scanner ; public class Main { public static void main ( String [] args ) { // write your code here int arr[] = new int [ 5 ]; Scanner sc = new Scanner ( System . in); for ( int i = 0 ;i < 5 ;i ++ ) { arr[i] = sc . nextInt(); } for ( int i = 0 ;i < arr . length;i ++ ) { System . out . println(factorial(arr[i])); ; } } private static int factorial ( int num ) { int fact = 1 ; for ( int i = 1 ;i <= num;i ++ ) fact = fact * i; return fact; } }
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Square Root of a number without using math.h function

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# include < stdio.h > # include < string.h > # include < stdlib.h > void main () { int number; float temp, sqrt ; scanf ( " %d " , &number); // store the half of the given number e.g from 256 => 128 sqrt = number / 2 ; temp = 0 ; // Iterate until sqrt is different of temp, that is updated on the loop while ( sqrt != temp){ // initially 0, is updated with the initial value of 128 // (on second iteration = 65) // and so on temp = sqrt ; // Then, replace values (256 / 128 + 128 ) / 2 = 65 // (on second iteration 34.46923076923077) // and so on sqrt = ( number/temp + temp) / 2 ; } printf ( " %.0f " , sqrt ); }
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