hackerrank Solutions

Write a C program to read the strings from a file.  #include <stdio.h> #include <stdlib.h> int main() { char c[1000]; FILE *fpt…

Write a C program for file open, file write and file close. #include <stdio.h> #include <stdlib.h> int main() { int num; FILE *f…

Write a program to demonstrate the use of bitwise shift operators. #include <stdio.h> int main() { int a=20; int c=0; c = a<&…

Write a C program that demonstrates bitwise logical operators. #include <stdio.h> int main() { int a = 20; int b = 21; int …

Write a C Program to find sum and product using macros. #include <stdio.h> #define SUM(x, y) (x + y) #define prod(t,r) t*r int main() { …

Write a C program to calculate area of circle using #define. #include <stdio.h> #include <conio.h> #define PI 3.141 int main() …

Write a C program to declare, initialize an union, example of union.  #include <stdio.h> union pack{ char a; int b; double c; }; int main() {…

Write a C program to demonstrate example of structure of array. #include <stdio.h> struct student { char name [30]; int marks[ 5];…

Write a program in C to read and print a student’s detail using structure. #include <stdio.h> struct student { char firstName[50]; …

Write a program in C to convert a string to uppercase.  #include <stdio.h> #include <string.h> int main() { char s[100]; int i; …

Write a program in C to read a sentence and replace lowercase characters by uppercase and vice-versa . #include <stdio.h> #include <strin…

Write a program in C to count total number of vowel or consonant in a string. #include <stdio.h> #include <string.h> #define MAX_SIZE…

Write a program in C to copy one string to another string.  #include <stdio.h> #define MAX_SIZE 100 int main() { char text1[MAX_SIZE]; …

Write a program in C to count total number of alphabets, digits and special characters in a string. #include<stdio.h> #include <string.h…

Write a program in C to compare two strings without using string library functions. #include <stdio.h> #define str_size 100 int test(char* s…

Write a program in C to print individual characters of string in reverse order. #include <stdio.h> int main() { char str[1000], rev[1000]…

Write a program in C to input a string and print it. #include <stdio.h> int main() { char array[100]; printf("Enter a string\n&q…

Write a program in C to find the length of a string without using library function. #include <stdio.h> void main() { char string[50]; …

Write a program to implement pointer to function. #include <stdio.h> int sum(int x, int y) { return x+y; } int main() { int (*fp)(i…

Write a program to implement generic pointer. #include <stdio.h> #define SIZE 10 void printArray(void * vPtr, int size, int type); int main(…