3. Q1. Write a program that will read a string and show each
character with one space.
#include<stdio.h>
int main ()
{
char ch[1000];
int i;
printf("ENTER A STRING:n");
gets(ch);
printf("WITH SPACE : n");
for(i=0;ch[i]!='0';i++)
{
printf("%c ",ch[i]);
}
return 0;
}
4. Q2. Write a program that will read a string and show each
character with one space in reverse order.
#include<stdio.h>
int main ()
{
char ch[1000];
int i,j;
printf("ENTER A STRING:n");
gets(ch);
printf("REVERS PRINT WITH SPACE : n");
for(i=0;ch[i]!='0';i++);
for(j=i-1;j>=0;j--)
{
printf("%c ",ch[j]);
}
return 0;
}
5. Q3. Write a program that will read a string and show each
character in separate line.
#include<stdio.h>
int main ()
{
char ch[1000];
int i;
printf("ENTER A STRING:n");
gets(ch);
printf("EACH CHARACTER IN SEPARATE LINE: n");
for(i=0;ch[i]!='0';i++)
{
printf("%cn",ch[i]);
}
return 0;
}
6. Q4. Write a program that will read a string and show each
character and corresponding ASCII value in separate line.
#include<stdio.h>
int main ()
{
char ch[1000];
int i;
printf("ENTER A STRING:n");
gets(ch);
printf("EACH CHARACTER IN SEPARATE LINE WITH CORRESPONDING
ASCII VALUE: n");
for(i=0;ch[i]!='0';i++)
{
printf("%ct%dn",ch[i],ch[i]);
}
return 0;
}
7. Q5. Write a program that will read a string and show frequency of
every character in this string.
#include<stdio.h>
int main ()
{
char ch[1000];
int i,count[26]={0};
printf("ENTER A STRING:n");
gets(ch);
for(i=0;ch[i]!='0';i++)
{
if(ch[i]>='a'&&ch[i]<='z')
count[ch[i]-'a']++;
}
for(i=0;i<26;i++)
{
if(count[i]!=0)
printf("%c OCCURS %d TIME(S):n",i+'a',count[i]);
}
return 0;
}
8. Q6. Write a program that will read a string and show the length of
that string.
#include<stdio.h>
int main ()
{
char ch[1000];
int i;
printf("ENTER A STRING:n");
gets(ch);
for(i=0;ch[i]!='0';i++);
printf("LENGTH OF THE STRING IS : %d",i);
return 0;
}
9. Q7. Write a program that will read a string and show the string in
reverse order.
#include<stdio.h>
int main ()
{
char ch[1000];
int i,j;
printf("ENTER A STRING:n");
gets(ch);
printf("REVERS PRINT : n");
for(i=0;ch[i]!='0';i++);
for(j=i-1;j>=0;j--)
{
printf("%c",ch[j]);
}
return 0;
}
10. Q8. Write a program that will read a string and copy this to
another string.
#include<stdio.h>
int main ()
{
char ch[100],st[100];
int i,j;
printf("ENTER A STRING:n");
gets(ch);
for(i=0;ch[i]!='0';++i)
{
st[i]=ch[i];
}
st[i]='0';
puts(st);
return 0;
}
11. Q9. Write a program that will read two strings and add second
string with first string.
#include<stdio.h>
int main ()
{
char ch[100],st[100];
printf("ENTER FIRST STRING:n");
gets(ch);
printf("ENTER SECOND STRING:n");
gets(st);
strcat(ch,st);
printf("n%s",ch);
return 0;
}
12. Q10. Write a program that will read two strings and compare
which one is greater.
#include<stdio.h>
int main ()
{
char ch[1000],st[1000];
int i,j;
printf("ENTER FIRST STRING:n");
gets(ch);
for(i=0;ch[i]!='0';i++);
printf("ENTER SECOND STRING:n");
gets(st);
for(j=0;st[j]!='0';j++);
if(i>j) printf("STRING 1 IS GREATER");
else printf("STRING 2 IS GREATER");
return 0;
}
13. Q11. Write a program that will read a string and convert all
lowercase letter to uppercase and all uppercase letter to
lowercase.
#include<stdio.h>
int main ()
{
int c;
char ch,s[1000];
printf("ENTER A STRINGn");
gets(s);
for(c=0;s[c]!='0';c++)
{
ch=s[c];
if(ch >= 'A' && ch <= 'Z')
s[c]= s[c]+32;
else if(ch >= 'a' && ch <= 'z')
s[c]= s[c]-32;
}
printf("%sn",s);
return 0;
}
15. Q1. Write a function that gets two integers and returns sum.
#include<stdio.h>
int sum(int a, int b)
{
int result;
result=a+b;
return result;
}
int main ()
{
int x,y,res;
printf("ENTER TWO NUMBERS:n");
scanf("%d %d",&x,&y);
res=sum(x,y);
printf("SUM OF %d AND %d IS %d",x,y,res);
return 0;
}
16. Q2. Write a function that gets two integers and returns division.
#include<stdio.h>
int sum(int a, int b)
{
int result;
result=a+b;
return result;
}
int main ()
{
int x,y,res;
printf("ENTER TWO NUMBERS:n");
scanf("%d %d",&x,&y);
res=sum(x,y);
printf("SUM OF %d AND %d IS %d",x,y,res);
return 0;
}
17. Q3. Write a function that gets length and width of a
rectangle and returns area
#include<stdio.h>
int result;
int mul(int a, int b)
{
result=a*b;
return result;
}
int main ()
{
int x,y;
printf("ENTER LENGTH OF THE RECTANGLE:n");
scanf("%d",&x);
printf("ENTER HIGHT OF THE RECTANGLE:n");
scanf("%d",&y);
mul(x,y);
printf("AREA OF THE RECTANGLE IS %d SQUARE UNIT",result);
return 0;
}
18. Q4. Write a function that gets radius of a circle and
returns area.
#include<stdio.h>
void ara(float x)
{
float result;
float pi=3.1416;
result=pi*x*x;
printf("AREA OF THE CIRCLE IS %.3f SQUARE UNIT",result);
}
int main ()
{
float r;
printf("ENTER THE RADIOUS OF THE CIRCLE :n");
scanf("%f",&r);
ara(r);
return 0;
}
19. Q5. Write a function that gets any positive integer and
returns its factorial.
#include<stdio.h>
int fac(int x)
{
int i,j=1;
for (i=1;i<=x;i++)
{
j=j*i;
}
return j;
}
int main ()
{ int y,z;
printf("ENTER A NUMBERn");
scanf("%d",&y);
if(y>=0)
{
z=fac(y);
printf("FACTORIAL OF %d IS %d",y,z);
}
else printf("Number is negative");
return 0;
}
20. Q6. Write a function that gets any positive integer and
returns its reverse
#include<stdio.h>
int revrs(int num)
{
int reminder,reverse=0,res;
while(num>0)
{
reminder = num%10;
num = num/10;
reverse = reverse*10+reminder;
}
return reverse;
}
int main()
{
int a,res;
printf("Enter a positive integer number: ");
scanf("%d",&a);
if(a<0)
{
printf("Number is negativen");
} else
{
res = revrs(a);
printf("%d",res);
}
return 0;
}
21. Q7. Write a function that gets two positive integers and
returns LCM (Least Common Multiple).
#include<stdio.h>
void lcm(int x,int y)
{
int i=1;
while(i>0)
{
if(i%x==0 && i%y==0)
{
printf("THE LCM OF %d AND %d IS %d",x,y,i);
break;
}i++;
}
}
int main ()
{
int p,q;
scanf("%d %d",&p,&q);
lcm(p,q);
}
22. Q8. Write a function that gets two positive integers and
returns nCr.
#include<stdio.h>
int fac(int x)
{
int i,j=1;
for (i=1;i<=x;i++)
{
j=j*i;
}
return j;
}
int main()
{
int n,m,o,p,q,r,s;
printf("ENTER n:n");
scanf("%d",&n);
printf("ENTER r:n");
scanf("%d",&r);
o=fac(r);
m=fac(n);
p=(n-r);
q=fac(p);
if(n>=0 && r >=0 && n>=r){
s=m/(q*o);
printf("%dC%d = %d",n,r,s);
}
else printf("MATH ERROR");
}
23. Q9. Write a function that gets any positive integer and
determine prime or not prime.
#include<stdio.h>
int prime=0;
void pri(int x)
{
int i;
for(i=2;i<=x/2;i++)
{
if(x%i==0)
{
prime=1;
break;
}
}
if(prime==0) printf("%d IS A PRIME NUMBER",x);
else printf("%d IS NOT A PRIME NUMBER",x);
}
int main()
{
int n;
scanf("%d",&n);
pri(n);
}
