C Program to Print Number of Days in a Month using Switch Case Statement

Write a C program to enter month and print number of days in a month using switch case statement.
How to find the number of days in a month in C.

Required Knowledge

• C printf and scanf functions
• Switch case statement in C

C Hello World Program

Printing "Hello World" program is one of the simplest programs in C programming languages. It become the traditional first program that many people write while learning a new programming language. Hello world program helps in understanding basic syntax of C programming language and C program structure to novice programmers.

C Program to Display Current Date and Time

In this program, to get current time and print it in human readable string after converting it into local time we are using two functions defined in time.h header file time() and ctime().

C Program to Divide a String into Two Equal Strings

Here is a C program to divide a string in two equal sub strings. Given a string of length L, we have to split this string into two equal sub-strings.

• If L is even, then length of the sub-strings will be L/2 and L/2.
• If L is off, the length of sub-strings will be L/2 and (L/2)+1

For Example:
Input : "Internet" Output : "Inte" and "rnet"

Algorithm for split a string in two equal sub strings.
Let inputString be the string entered by user and leftHalf and rightHalf are two output sub-strings.

1. Find length of the string using strlen function. Let it be L.
2. Find the mid index of input string. (mid = L/2)
3. Copy characters of inputString from index 0 to mid to leftHalf.
4. Copy characters of inputString from index mid+1 to L-1 to rightHalf.

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C program to split a string into two equal strings

In this program, we will first read a string as input from user using gets function. Then we find the length of input string(L) using strlen function of string.h header file. Now, we will create two sub-strings as explained above and print it on screen.

#include<stdio.h>
#include<string.h>

int main() {

    char inputString[100], leftHalf[100], rightHalf[100];
    int length, mid, i, k;
 
    printf("Enter a string\n");
    gets(inputString);

    length = strlen(inputString);
 
    mid = length/2;
    
    for(i = 0; i < mid; i++) {
        leftHalf[i]= inputString[i];
    }
    leftHalf[i] = '\0';
 
    for(i = mid, k = 0; i <= length; i++, k++) {
        rightHalf[k]= inputString[i];
    }
 
    printf("Left half : %s\n",leftHalf);
    printf("Right half : %s\n",rightHalf);

    return 0;
}

Output

Enter a string
TECHCRASHCOURSE
Left half : TECHCRA
Right half : SHCOURSE

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List of all C programs

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