Tips and Tricks

#include<stdio.h> #include<conio.h> void main() {    int row, c, n, temp;    printf("Enter the number of rows in pyramid of stars you wish to see ");    scanf("%d",&n);    temp = n;     for ( row = 1 ; row <= n ; row++ )    {       for ( c = 1 ; c < temp ; c++ )          printf(" ");        temp--;        for ( c = 1 ; c <= 2*row - 1 ; c++ )          printf("$");        printf("\n");    }  getch(); } OUTPUT: Enter the number of rows in pyramid of stars you wish to see: 5 $ $$$ $$$$$ $$$$$$$ $$$$$$$$$

Write a c program or code to subtract two numbers without using subtraction operator #include <stdio.h> int main(){         int a,b;     int sum;     printf( "Enter any two integers: " );     scanf( "%d%d" ,&a,&b);     sum = a + ~b + 1;     printf( "Difference of two integers: %d" ,sum);     return 0; } Sample Output: Enter any two integers: 5 4 Difference of two integers: 1

How to calculate power of a number in c How to write power in c #include <stdio.h> int main(){   int pow,num,i=1;   long int sum=1;   printf( "\nEnter a number: " );   scanf( "%d" ,&num);   printf( "\nEnter power: " );   scanf( "%d" ,&pow);   while (i<=pow){             sum=sum*num;             i++;   }   printf( "\n%d to the power %d is: %ld" ,num,pow,sum);   return 0; }  output: Enter the number: 5 Enter the  Power:6   5 to the power 6 is :  15625  

Extract digits from integer in c language #include <stdio.h> int main(){   int num,temp,factor=1;   printf( "Enter a number: " );   scanf( "%d" ,&num);   temp=num;   while (temp){       temp=temp/10;       factor = factor*10;   }   printf( "Each digits of given number are: " );   while (factor>1){       factor = factor/10;       printf( "%d " ,num/factor);       num = num % factor;   }   return 0; } Sample output: Enter a number: 123 Each digits of given number are: 1 2 3

Add two numbers in c without using operator How to add two numbers without using the plus operator in c #include <stdio.h> int main(){         int a,b;     int sum;     printf( "Enter any two integers: " );     scanf( "%d%d" ,&a,&b);     //sum = a - (-b);     sum = a - ~b -1;     printf( "Sum of two integers: %d" ,sum);     return 0; } Sample output: Enter any two integers: 5 10 Sum of two integers: 15 Algorithm: In c ~ is 1's complement operator. This is equivalent to:   ~a = -b + 1 So, a - ~b -1 = a-(-b + 1) + 1 = a + b – 1 + 1 = a + b

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