#include <stdio.h>
#include <string.h>
main()
{
char y[4],t;
do
{
  char str[100]; 
  int s2=0,s1=0,s3=0,s4=0,s5=0,i=0;
printf("\t\t\tCHARACTER CHECKING\n\t\t\t_________ ________\n\tInput\n\t=====\n\t\tEnter a string: ");
  fgets(str, sizeof(str), stdin);
  str[strcspn(str,"\n")] = 0;
  while (str[i] !='\0') 
{
    if (str[i] == ' ')
{
      s1++;
    } 
    else if (!((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z') || (str[i] >= '0' && str[i] <= '9')))
{
      s2++;
    }
    else if (str[i] >= 'a' && str[i] <= 'z')
     s3++;
    else if (str[i] >= 'A' && str[i] <= 'Z')
     s4++;
    else if (str[i] >= '0' && str[i] <= '9
')
     s5++;
    i++;
  }
  printf("\tOutput\n\t======\n\t\tNumber of special characters: %d\n\t\tNumber of spaces: %d\n\t\tNumber of lower case later: %d\n\t\tNumber of uper case later: %d\n\t\tNumber of digits: %d\n",s2, s1,s3,s4,s5);
  printf("\n\n\t\t\t If you continue typr yes or no:");
scanf("%[^\n]s",&y);
scanf("%c",&t);
printf("______________________________________________________________________________");
  }while (((strcmp(y,"yes"))==0)||((strcmp(y,"YES"))==0)||((strcmp(y,"Yes"))==0));
  printf("\n\n\t\t\tThank you");
}
}
#include <stdio.h>
#include <string.h>
main()
{
float num1,num2,result;
char op;
float add(float num1, float num2);
float sub(float num1, float num2);
  float divide(float num1, float num2);
  float multiply(float num1, float num2);
  do
  {
  printf("\t\t\tArithmatic operator\n\t\t\t========== ========\n\tInput\n\t=====\n\t\tEnter an operator (+, -, *, /): ");
  scanf(" %c",&op);
  printf("\t\tEnter 1st numbers: ");
  scanf("%f", &num1);
  printf("\t\tEnter 2nd numbers: ");
  scanf("%f", &num2);
  printf("\tOutput\n\t======\n");
switch (op) 
{
    case '+':
      result = add(num1, num2);
      printf("\t\t%.2f + %.2f = %.2f\n", num1, num2, result);
      break;
    case '-':
      result = sub(num1, num2);
      printf("\t\t%.2f - %.2f = %.2f\n", num1, num2, result);
      break;
    case '*':
      result = multiply(num1, num2);
      printf("\t\t%.2f * %.2f = %.2f\n", num1, num2, result);
      break;
    case '/':
      result = divide(num1, num2);
      if (num2 != 0)
{ 
        printf("\t\t%.2f / %.2f = %.2f\n", num1, num2, result);
      }
      break;
    default:
      printf("\t\tError: Invalid operator entered.\n");
    }
    printf("\n\n\t\t\tIF YOU CONTINUE PRESS 1 : ");
    scanf("%f",&num1);
    printf("________________________________________________________\n\n");
  }while (num1==1);
  printf("\t\t\t THANK YOU");
}
float add(float num1, float num2)
{
  return num1 + num2;
}
float sub(float num1, float num2)
{
  return num1 - num2;
}
float multiply(float num1, float num2) 
{
  return num1 * num2;
}
float divide(float num1, float num2)
{
  if (num2 != 0)
{
    return num1 / num2;
  }
else 
{
    printf("\t\tError: Division by zero is not allowed.\n");
  }
  return 0;
}
#include <stdio.h>
main() 
{
int ch;
for(ch=1;ch==1;)
{
  int n,i;
  void m(int [],int);
  printf("\t\t\tFuntion of array\n\t\t\t======= == =====\n\tInput\n\t=====\n\t\tEnter a size of array : ");
  scanf("%d",&n);
  int a [n];
  for(i=0;i<n;i++)
  {
     printf("\t\tEnter elament %d : ",i+1);
  scanf("%d",&a[i]);
  }
  m (a, n);
  printf("\tOutput\n\t======\n\t\t");
  for(i=0;i<n;i++)
   {
  printf("____");
  }
  printf("\n\t\t|");
   for(i=0;i<n;i++)
  {
  printf(" %d |",a[i]);
  }
  printf("\t\t");
  for(i=0;i<n;i++)
  {
  printf("____");
  }
  printf("\n");
  printf("\n\n\t\t\t If you continue press 1 :");
  scanf("%d",&ch);
  }
  printf("\n\n\t\t\tThank you");
}
void m(int a[],int n)
{
int i;
for(i=0;i<n;i++)
{
  if (a[i]%2==0)
  {
  a[i]--;
  continue;
  }
  else
  {
  a[i]++;
  }
}
}

#include <stdio.h>
main() 
{
int ch;
for(ch=1;ch==1;)
{
  int n,i,r;
  float m( int );
  printf("\t\t\tNCR Formula\n\t\t\t=== =======\n\tInput\n\t=====\n\t\tEnter a n value : ");
  scanf("%d",&n);
  printf("\t\tEnter a r value : ");
  scanf("%d",&r);
  printf("\tOutput\n\t======\n\t\t");
   printf("Result = %.2f\n",((m(n))/((m(r))*m(n-r))));
printf("\n");
  printf("\n\n\t\t\t If you continue press 1 :");
  scanf("%d",&ch);
  }
  printf("\n\n\t\t\tThank you");
}
float m(int n)
{
int i;
int f=1;
for(i=1;i<=n;i++)
{
f=f*i;
}
return f;
}
#include <stdio.h>
#include <string.h>
main()
{
  char a[100][100]; 
  int b[100][100];
float t;  
  int y = 1,p, m, i, j, rmax;
  while (y == 1) 
{
    printf("\t\t\tPlayer Ranking Table\n\t\t\t====================\n\tInput\n\t_____\n\t\tEnter the number of players: ");
    scanf("%d", &p);
    printf("\t\tEnter the number of matches: ");
    scanf("%d", &m);
    for (i=0;i<p;i++) 
    {
      printf("\t\tEnter name of player %d : ",i + 1);
      scanf("%s",a[i]); 
    }
    for (i =0;i<p;i++) 
    {
      for (j = 0; j < m; j++) 
      {
        printf("\t\tEnter runs for player %s in match %d: ",a[i], j + 1);
        scanf("%d", &b[i][j]);
      }
    }
    printf("\n\t\t\tPlayer Scores Table\n");
    printf("\t\t\t_______________________\n");
    printf("Player Name\t");
    for (j=0;j<m;j++) 
     {
      printf("Match %d\t", j + 1);
    }
    printf(" MAX \t AVG \n");
    for (i = 0; i < p; i++) 
   {
      printf("%s\t\t", a[i]);
      rmax = b[i][0];
      t=0;
      for (j = 0; j < m; j++) 
    {
        printf(" %d\t", b[i][j]);
        if (b[i][j] > rmax) 
{
          rmax = b[i][j];
      }
      t=t+b[i][j];
    }
    printf(" %d\t %.2f\n", rmax,t/m);
    }
    printf("\n______________________________________________\n");
    printf("If you want to continue, press 1: ");
    scanf("%d", &y);
  }
  printf("\n\n\t\t\tThank you");
}
#include<stdio.h>
#include <string.h>
main() 
{
int y=1,ch;
char a[100];
  char b[100];
while(y==1)
{
printf("\t\t\tstring\n");
    printf("\t\t\t======\n");
    printf("\t\t1.Strcmp\n\t\t2.strlen\n\t\t3.strstr\n\t\t4.strcat\n\t\t5.strcpy\n");
    printf("\t\tEnter a choice:");
    scanf("%d",&ch);
    switch(ch)
    {
    case 1:
        printf("\t\t\tstring camparision\n\t\t\t==================\n\tInput\n\t=====\n\t\tEnter the first string: ");
        scanf("%s", a);
        getchar();
        printf("\t\tEnter the second string: ");
        scanf("%s",b);  
        printf("\toutput\n");
        printf("\t======\n");
        if (strcmp(a,b)==0) 
     {
          printf("\t\tThe 1st and 2nd strings are equal\n");
        } 
     else 
     {
          printf("\t\tThe 1st and 2nd strings are not equal\n");
        }
        break;
      case 2:
       printf("\t\t\tfind the sting length\n\t\t\t=====================\n\tInput\n\t`````\n\t\tEnter a string:");
        scanf("%s",a);
        getchar();
        printf("\toutput\n\t======\n\t\tLength of the string: %lu\n", strlen(a));
        break;
      case 3:
        printf("\t\t\tFind the sub string\n\t\t\t=====================\n\tInput\n\t=====\n\t\tEnter the first string: ");
        scanf("%s",a);
        getchar();
        printf("\t\tEnter the second string: ");
        scanf("%s",b);
getchar();  
        printf("\toutput\n\t======\n");
        if(strstr(a,b)!=0)
        {
         printf("\t\tsub string of first string=%s",b);
       }
      else
      {
      printf("\t\tThe string is not found");
     }
     break;
   case 4:
   printf("\t\t\t string cat\n\t\t\t===========\n\tInput\n\t=====\n\t\tEnter the first string: ");
        scanf("%s",a);
        getchar();
        printf("\t\tEnter the second string: ");
        scanf("%s",b);
        getchar();
        printf("\toutput\n\t======\n\t\tThe string =%s",strcat(a,b));
        break;
      case 5:
        printf("\t\t\t string cpy\n\t\t\t===========\n\tInput\n\t=====\n\t\tEnter the first string: ");
        scanf("%s", a);
        getchar();  
        printf("\t\tEnter the second string: ");
        scanf("%99[^\n]", b);  
        strcpy(a,b);
        printf("\toutput\n\t======\n\t\tstring = %s\n", a);
        break;
      default:
       printf("\t\tError: Invalid operator entered.\n");
    }
    printf("\n\n\t\t\tIf you want to continue, press 1: ");
    scanf("%d", &y);
    getchar();
}
printf("\n\n\t\t\tThank you");
}

⚠️Content was pasted as plain text and auto-formatted as a code block. Use the Code Block button in the editor for proper formatting.