C Basic Programming

Print Hello world:

#include<stdio.h> int main() { printf("hello world\n"); return 0; }

Take input in and print your name:

#include<stdio.h> int main() { char name[20]; printf("your name : "); scanf("%s",&name); printf(name); return 0; }

Take integer input:

#include<stdio.h> int main() { int a; //variable declaration printf("Enter the integer value= ", a); scanf("%d" , &a); //used to take input printf("The integer value is =%d ", a); // to print return 0; //if u are taking int main() then its necessary to write return 0 in the end }

Addition of two numbers:

#include<stdio.h> int main() { int a, b; printf("enter the value of a =", a); scanf("%d", &a); printf("enter the vlue of b =", b); scanf("%d", &b); printf("sum of a & b is = %d", a+b); return 0; }

To take integer and float no:

#include<stdio.h> int main() { int a=4; float b=8.8876546; //%17.3f , .3f will print only 3 integer after decimal printf("the value of a is=%d \n the value of b is=%17.3f", a,b); return 0; }

Area of a circle:

#include<stdio.h> #define PI 3.14 int main() { float r=2,area; area= PI*r*r; printf("area of a circle=%f ", area); return 0; }

Use of Escape sequence:

#include<stdio.h> int main() { printf("Gita autonomous college\n"); printf("Gita\n autonomous\n college\n"); printf("Gi\bta autonomous college\n"); printf("Gita\f autonomous college\n"); printf("Gita autonomous college\n"); }

Input character is vowel or cosonent:

#include<stdio.h> main() { char ch; printf("input a character\n"); scanf("%c", &ch); if(ch=='a' || ch=='A' || ch=='e' || ch=='E' || ch=='i' || ch=='I' || ch=='o'|| ch=='O' || ch=='u' || ch=='U') printf("%c is vowel word\n",ch); else printf("%c is cosonent\n",ch); }

Upper case or not:

#include<stdio.h> int main() { char ch; printf("enter the character\n"); scanf("%c", &ch); if((ch>='A' && ch<='Z')) printf("%c is a upper case",ch); else printf("%c is not a upper case",ch); return 0; }

Even odd no:

#include<stdio.h> int main() { int a; printf("enter a integer value :"); scanf("%d",&a); if(a%2==0) printf("its an even no",a); else printf("its an odd no",a); return 0; }

Value is -ve or +ve:

#include<stdio.h> int main() { int x; printf("enter the int value="); scanf("%d", &x); if(x<0) printf("its a negative value",x); if(x==0) printf("its a zero"); if(x>0) printf("its a positive value"); return 0; }

Sum of two no using dunction:

#include <stdio.h> int addNumbers(int a, int b); // function prototype int main() { int n1,n2,sum; printf("Enters two numbers: "); scanf("%d %d",&n1,&n2); sum = addNumbers(n1, n2); // function call printf("sum = %d",sum); return 0; } int addNumbers(int a, int b) // function definition { int result; result = a+b; }

palindromic number:

Enter your code

Total avg and sum of five student:

#include <stdio.h> int main() { float eng, phy, chem, math, comp; float total, average, percentage; /* Input marks of all five subjects */ printf("Enter marks of five subjects: eng, &phy, &chem, &math, &comp\n"); scanf("%f%f%f%f%f", &eng, &phy, &chem, &math, &comp); /* Calculate total, average and percentage */ total = eng + phy + chem + math + comp; average = total / 5.0; percentage = (total / 500.0) * 100; /* Print all results */ printf("Total marks = %.2f\n", total); printf("Average marks = %.2f\n", average); printf("Percentage = %.2f", percentage); return 0; }

Rev of character using string':

#include<stdio.h> #include<string.h> void main() { int i,n; char str[20]; printf("Enter the String to get reversed\n"); gets(str); n=strlen(str); printf("\nReversed string is \n"); for(i=n-1;i>=0;i--) { printf("%c",str[i]); } }

Rev of character using string without using string:

'#include <stdio.h> #include <string.h> int main() { char Str[100], RevStr[100]; int i, j, len; printf("\n Please Enter any String : "); gets(Str); j = 0; len = strlen(Str); for (i = len - 1; i >= 0; i--) { RevStr[j++] = Str[i]; } RevStr[i] = '\0'; printf("\n String after Reversing = %s", RevStr); return 0; }

given character is alphabet or not,,,,:

/* for sku*/ #include <stdio.h> void main() { char c; printf("Enter a character: "); scanf("%c", &c); if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) printf("Entered character %c is an alphabet.", c); else printf("Entered character %c is not an alphabet.", c); }

Insertion sort:

#include <stdio.h> void insert(int a[], int n) /* function to sort an aay with insertion sort */ { int i, j, temp; for (i = 1; i < n; i++) { temp = a[i]; j = i - 1; while(j>=0 && temp <= a[j]) /* Move the elements greater than temp to one position ahead from their current position*/ { a[j+1] = a[j]; j = j-1; } a[j+1] = temp; } } void printArr(int a[], int n) /* function to print the array */ { int i; for (i = 0; i < n; i++) printf("%d ", a[i]); } int main() { int a[] = { 12, 31, 25, 8, 32, 17 }; int n = sizeof(a) / sizeof(a[0]); printf("Before sorting array elements are - \n"); printArr(a, n); insert(a, n); printf("\nAfter sorting array elements are - \n"); printArr(a, n); return 0; }

Swap value by call by reference:

/* Call by reference in C In call by reference, the address of the variable is passed into the function call as the actual parameter. The value of the actual parameters can be modified by changing the formal parameters since the address of the actual parameters is passed. In call by reference, the memory allocation is similar for both formal parameters and actual parameters. All the operations in the function are performed on the value stored at the address of the actual parameters, and the modified value gets stored at the same address. */ #include <stdio.h> void swap(int *, int *); //prototype of the function int main() { int a = 10; int b = 20; printf("Before swapping the values in main a = %d, b = %d\n",a,b); // printing the value of a and b in main swap(&a,&b); printf("After swapping values in main a = %d, b = %d\n",a,b); // The values of actual parameters do change in call by reference, a = 10, b = 20 } void swap (int *a, int *b) { int temp; temp = *a; *a=*b; *b=temp; printf("After swapping values in function a = %d, b = %d\n",*a,*b); // Formal parameters, a = 20, b = 10 }

Simple calcy using switch loop:

// making digital calculator #include<stdio.h> int main() { int a,b; char n; printf("Please enter operatpor(+ , - , * , / ,%): "); scanf("%c",&n); printf("Please enter two operand\n"); scanf("%d %d", &a,&b); switch(n) { case'+': printf("%d + %d = %d",a,b,a+b); break; case'-': printf("%d - %d = %d",a,b,a-b); break; case'*': printf("%d * %d = %d",a,b,a*b); break; case'/': printf("%d / %d = %d",a,b,a/b); break; case'%': printf("%d % % d = %d",a,b,a%b); break; default: printf("kya engineer bnega re tu"); } }

Normal triangle:

#include <stdio.h> int main() { int i, j, rows; printf("Enter the number of rows: "); scanf("%d", &rows); for (i = 1; i <= rows; ++i) { for (j = 1; j <= i; ++j) { printf("%d ", j); } printf("\n"); } return 0; }

palindromic number:

Enter code here

Reverse number:

Enter your code