C Tutorial
#include <stdio.h> int main() { int n, count, sum = 0; printf(“Enter the value of n(positive integer): “); scanf(“%d”,&n); for(count=1; count <= n; count++) { sum = sum + count; } printf(“Sum of first %d natural numbers is: %d”,n, sum); return 0; }
#include <stdio.h> int main() { int num, reverse_num=0, remainder,temp; printf(“Enter an integer: “); scanf(“%d”, &num); temp=num; while(temp!=0) { remainder=temp%10; reverse_num=reverse_num*10+remainder; temp/=10; } if(reverse_num==num) printf(“%d is a palindrome number”,num); else printf(“%d is not a palindrome number”,num); return 0; }
#include <stdio.h> int main() { char ch; printf(“Enter any character: “); scanf(“%c”,&ch); if( (ch>=’a’ && ch<=’z’) || (ch>=’A’ && ch<=’Z’)) printf(“The entered character %c is an Alphabet”,ch); else printf(“The entered character %c is not an Alphabet”,ch); return 0; }
#include<stdio.h> int main() { // This variable is to store the input number int num; printf(“Enter an integer: “); scanf(“%d”,&num); if ( num%2 == 0 ) printf(“%d is an even number”, num); else printf(“%d is an odd number”, num); return 0; }
#include<stdio.h> #include<string.h> int main(){ int i,j,count; char str[25][25],temp[25]; puts(“How many strings u are going to enter?: “); scanf(“%d”,&count); puts(“Enter Strings one by one: “); for(i=0;i<=count;i++) gets(str[i]); for(i=0;i<=count;i++) for(j=i+1;j<=count;j++){ if(strcmp(str[i],str[j])>0){ strcpy(temp,str[i]); strcpy(str[i],str[j]); strcpy(str[j],temp); } } printf(“Order of Sorted Strings:”); for(i=0;i<=count;i++) puts(str[i]); return 0; }
#include<stdio.h> #include<string.h> int main(){ int i,j,count; char str[25][25],temp[25]; puts(“How many strings u are going to enter?: “); scanf(“%d”,&count); puts(“Enter Strings one by one: “); for(i=0;i<=count;i++) gets(str[i]); for(i=0;i<=count;i++) for(j=i+1;j<=count;j++){ if(strcmp(str[i],str[j])>0){ strcpy(temp,str[i]); strcpy(str[i],str[j]); strcpy(str[j],temp); } } printf(“Order of Sorted Strings:”); for(i=0;i<=count;i++) puts(str[i]); return 0; }
#include<stdio.h> #include<string.h> int main(){ /* This array can hold a string of upto 26 * chars, if you are going to enter larger string * then increase the array size accordingly */ char str[26]; int i; printf(“Enter the string: “); scanf(“%s”,str); for(i=0;i<=strlen(str);i++){ if(str[i]>=65&&str[i]<=90) str[i]=str[i]+32; } printf(“\nLower Case String is: %s”,str); return 0; }
#include <stdio.h> #include <math.h> /* This function converts the decimal number “decimalnum” * to the equivalent octal number */ int decimalToOctal(int decimalnum) { int octalnum = 0, temp = 1; while (decimalnum != 0) { octalnum = octalnum + (decimalnum % 8) * temp; decimalnum = decimalnum / 8; temp = temp * 10; } … Read more
#include <stdio.h> void main() { int n, r, npr_var; printf(“Enter the value of n:”); scanf(“%d”, &n); printf(“\nEnter the value of r:”); scanf(“%d”, &r); /* nPr is also known as P(n,r), the formula is: * P(n,r) = n! / (n – r)! For 0 <= r <= n. */ npr_var = fact(n) / fact(n – r); … Read more
#include <stdio.h> int main() { char str[100]; char *p; int vCount=0,cCount=0; printf(“Enter any string: “); fgets(str, 100, stdin); //assign base address of char array to pointer p=str; //’\0′ signifies end of the string while(*p!=’\0′) { if(*p==’A’ ||*p==’E’ ||*p==’I’ ||*p==’O’ ||*p==’U’ ||*p==’a’ ||*p==’e’ ||*p==’i’ ||*p==’o’ ||*p==’u’) vCount++; else cCount++; //increase the pointer, to point next … Read more