C Programming Basics programming list and examples

Basic Syntax
#include <stdio.h>
The header file stdio.h stands for Standard Input Output.
int main()
Main functions from where the program starts executing
Followed by the body of the program
/* Comments */ -------------> comments in C

Initially num=1
Iteration Comparison Output Operation Num value
1 1<=10 Yes 1 num++ 2
2 2<=10 2 num++ 3

#include <stdio.h>
int main () {
for( ; ; ) {
printf("This loop will run forever.n");
}
return 0;
}

Functions in C
The general form of a function definition in C programming language
is as follows −
return_type function_name( parameter list ) {
body of the function
}

/* function returning the max between two numbers */
int max(int num1, int num2) {
/* local variable declaration */
int result;
if (num1 > num2)
result = num1;
else
result = num2;
return result;
}

For the above defined function max(), the function declaration is as follows −
int max(int num1, int num2);
Parameter names are not important in function declaration only their type is
required, so the following is also a valid declaration −
int max(int, int);
/* calling a function to get max value */
ret = max(a, b);

Arrays
Arrays a kind of data structure that can store a fixed-size sequential collection
of elements of the same type.

Initialization : sum=0 and Consider n=5
array= 1,2,3,4,5
Iteration Variable C Comparison Output
1 0 0<5 Yes sum= sum+array[c]
sum=0+array[0]
0+1=1
2 1 1<5 Yes sum=1+array[1]
1+2=3
3 2 2<Yes sum=3+array[1]
3+3=6

Iteration Variable C Comparison Output
6+4=10
10+5=15

struct student
{
int roll_no;
char name[100];
}
struct student *s;
s->roll_no=12;
s->name=”ABC”;

typedef
The typedef is a keyword used in C programming to provide some
meaningful names to the already existing variable in the C program.
Syntax of typedef
typedef <existing_name> <alias_name>

struct student
{
char name[20];
int age;
};
typedef struct student stud;
stud s1, s2;

C Programming Basics programming list and examples

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