C Prog Hub

#include <stdio.h> int main() { int a, b, c, largest; printf ("Enter three numbers : "); scanf ("%d%d%d", &a, &b, &c); largest = a; // Let 'a' be the largest number if(b > largest) largest = b; if(c > largest) largest = c; printf ("\n%d is the largest number.", largest); // To find the smallest number, replace '>' with '<' return 0; } Link : https://repl.it/@nithin_gudla/largest3numbers Enter three numbers : 52 98 64 98 is the largest number.

#include <stdio.h> int main() {    int a,b;    printf("Enter two numbers : ");    scanf("%d%d", &a, &b);    if(a > b)       printf("\n%d is greater than %d.", a, b);    else       printf("\n%d is greater than %d.", b, a);    return 0; } Enter two numbers : 5 7 7 is greater than 5.

#include <stdio.h> int main() { int year; printf("Enter year : "); scanf("%d", &year); if (((year % 4 == 0) && (year % 100!= 0)) || (year % 400 == 0)) printf("\n%d is a leap year", year); else printf("\n%d is not a leap year", year); return 0; } Link :  https://repl.it/@nithin_gudla/leapyear Enter year : 2020 2020 is a leap year.

#include <stdio.h> int main() {     char ch;     printf("Enter an alphabet\t:\t");     scanf("%c", &ch);     if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u'||        ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U')         printf("\n'%c' is a vowel", ch);     else         printf("\n'%c' is a consonant", ch);     return 0; } Enter an alphabet : U 'U' is a vowel

#include <stdio.h> int main() {   int a,b;   printf("Enter two numbers ");   scanf("%d%d", &a, &b );   printf("\nBefore swapping, a = %d and b = %d", a, b);   a = a + b;   b = a - b;   a = a - b;   printf("\nAfter swapping, a=%d and b=%d", a, b);   return 0; } Enter two numbers 7 9 Before swapping, a = 7 and b = 9 After swapping, a=9 and b=7

#include <stdio.h> int main() {   int a,b,c;   printf("Enter two numbers ");   scanf("%d%d", &a, &b );   printf("\nBefore swapping, a = %d and b = %d", a, b);   c = a;   a = b;   b = c;   printf("\nAfter swapping, a=%d and b=%d", a, b);   return 0; } Enter two numbers 3 4 Before swapping, a = 3 and b = 4 After swapping, a=4 and b=3

#include <stdio.h> int main() {   int n;   printf("Enter a number\t:\t");   scanf("%d", &n);   if(n % 2 == 0)     printf("\n%d is an even number", n);   else     printf("\n%d is a odd number", n);   return 0; } Enter a number : 5 5 is a odd number

#include <stdio.h> int main() {   int n;   printf("Enter a number\t:\t");   scanf("%d", &n );   if(n == 0)     printf("\n%d is a neutral number", n);   else   if(n > 0)     printf("\n%d is a positive number", n);   else     printf("\n%d is a negative number", n);   return 0; } Enter a number : -6 -6 is a negative number

#include <stdio.h> #define pi 3.14   // defining pi=3.14 int main() {   float radius,area,perimeter;   printf("Radius\t:\t");   scanf("%f", &radius);   area = pi*radius*radius;   perimeter = 2*pi*radius;   printf("\nArea\t\t:\t%.2f", area);   printf("\nPerimeter\t:\t%.2f", perimeter);   return 0; } Radius : 5 Area : 78.50 Perimeter : 31.40

#include <stdio.h> int main() {   float length, breadth, area, perimeter ;   printf("Length\t:\t");   scanf("%f", &length );   printf("Breadth\t:\t");   scanf("%f", &breadth );   area=length*breadth;   perimeter=2*( length + breadth );   printf("\nArea\t:\t%f", area);   printf("\nPerimeter\t:\t%f", perimeter);   return 0; } Length : 5.64 Breadth : 4.86 Area : 27.41 Perimeter : 21.00

#include <stdio.h> int main() {   int a,b,rem,quo;   float finalresult;   printf("Enter two numbers\t:\t");   scanf("%d%d", &a , &b );   quo=a / b;   rem=a % b;   finalresult=(float) a / b;   printf("\nQuotient\t:\t%d", quo);   printf("\nRemainder\t:\t%d", rem);   printf("\nFinal Result\t:\t%f", finalresult);   return 0; } Enter two numbers : 24 9 Quotient : 2 Remainder : 6 Final Result : 2.666667

#include <stdio.h> #include<stdlib.h>  // since we are using abs() function int main() {   int a,b,c;   printf("Enter two numbers\t:\t");   scanf("%d%d", &a , &b );   c= abs (a - b);   printf("The absolute difference between %d and %d is %d", a, b, c);   return 0; } Enter two numbers : 5 6 The average of 5 and 6 is 1

#include <stdio.h> int main() {   int a, b, c;   printf("Enter two numbers\t:\t");   scanf("%d%d", &a , &b );   c = a - b;   printf("The difference between %d and %d is %d", a, b, c);   return 0; } Enter two numbers : 5 6 The average of 5 and 6 is -1

#include <stdio.h> int main() {   int a, b;   float avg;   printf("Enter two numbers\t:\t");   scanf("%d%d", &a , &b );   avg = (float) (a + b) / 2;   printf("The average of %d and %d is %f", a, b, avg);   return 0; } Enter two numbers : 5 6 The average of 5 and 6 is 5.500000

#include <stdio.h> int main() {   int a, b, c;   printf("Enter two numbers\t:\t");   scanf("%d%d", &a , &b );   c= a + b;   printf("The sum of %d and %d is %d", a, b, c);   return 0; } Enter two numbers : 2 3 The sum of 2 and 3 is 5

#include<stdio.h> int main() {   char ch;   printf("Enter a character\t:\t");   scanf("%c", &ch );   printf("The character you have entered is %c", ch);   return 0; } Enter a character : m The character you have entered is m

#include<stdio.h> int main() { int n; printf("Enter a number\t:\t"); scanf("%d", &n ); printf("The number you have entered is %d", n); return 0; } Enter a number : 5 The number you have entered is 5

In C programming both the 'int main()' and 'void main()' are accepted. 'void main()' means that the main function doesn't return anything. void main() {     // statements   } 'int main()' says that the main function will return an integer to the operating system. For that we will return an integer to the operating system. int main() {     // statements     return 0; // since 0 is an integer } Some compilers are designed in such a way that they can't accept main function without returning anything, for those compilers we have to use 'int main()'.

To read input from the keyboard, we have to use a pre-defined function "scanf()". The syntax for "scanf()" function is scanf("format string", arguments list); A format string can be : %d (integer), %s (string) , %f (floating point number), %c (character) , %lf etc. Ex : scanf("%d", &input); // for single input       Here '%d' represents an integer and 'input' is the name assigned to that integer. scanf("%d%c", &input1 , &input2 ); // for multiple inputs To use 'scanf()' function also, we have to include a header file "stdio.h", i,e #include<stdio.h> or #include"stdio.h"

To print text in new line, we use '\n' character which moves the cursor to the next line. #include <stdio.h> int main() {     printf("Hello\nWorld!");     return 0; } OUTPUT  : Hello World! Similarly '\t' generates one tab space in a line.

#include <stdio.h> int main() { printf("Hello, World!"); return 0; } Hello, World!

We can display the text on monitor/ screen using a standard library function "printf()". The syntax for the "printf()" statement is printf(" "); printf(" Hi "); The above statement displays "Hi' on monitor. printf("format string", arguments list ); A format string can be  : %d (integer), %s (string) , %f (floating point number), %c (character) , %lf etc. Ex : printf ( " %d " , output); // for single output     Here '%d' represents an integer and 'output' is the name assigned to that integer. printf("%d%c", output1 , output2 ); // for multiple outputs To use printf statement in our program, we have to include a header file "stdio.h" i.e   #include<stdio.h> or #include"stdio.h"

#include <stdio.h> int main() {     // Set of statements     return 0; }