Write a program that will take a string and count ' a '

#include<stdio.h>
#include<string.h>
main()
{
    int i,j,count=0;
    char str1[100],str2[100];
    printf("Enter first string   ");

write a program that will take 2 string from user and concatenate the 2nd string after first string

#include<stdio.h>
#include<string.h>
main()
{
    int i,j;
    char str1[100],str2[100];
    printf("Enter first string   ");
    gets(str1);/// str1 = "We"

write a program that will take 2 string from user and copy the string into first string

#include<stdio.h>
main()
{
    int i;
    char str1[100],str2[100];
    printf("Enter first string   ");
    gets(str1);/// str1 = "We"

write a program that will show the max value in an array using function

#include<stdio.h>
void maximum(int array[],int i)
{

    int max = array[0];///3

    int min = array[0];///3

Array input and out and sum using function in c

///Array display using function

///write a program that will print their value and sum
#include<stdio.h>
int arrayDisplay(int b[],int i)
{
    int sum =0;
    for(i=0;i<5;i++)
    {
        printf("%d ",b[i]);
        sum =sum + b[i];

    }
   // printf("\nsum = %d\n",sum);
   return sum ;
}
void main()
{
    int a[]={3,4,5,6,7},i;
    printf("sum =%d",arrayDisplay(a,i));
}

Function in c with return example

/// write a program that will take two
///integers and find out their summation
///in add() function and also the subtraction in sub() function

#include<stdio.h>

int add(int a, int b )
{
    return a + b  ;

}

int sub(int a,int b)
{
    return a-b;

}


void main()
{
   scanf("%d%d",&a,&b);
   printf("Summation = %d \n",add(a,b));
   printf("subtraction = %d \n",sub(a,b));

}

Add sub and multiplication example in c with function 3

#include<stdio.h>

void add(int x ,int b,char letter)
{

    printf("summation=%d \n",x+b);

}

void sub(int x,int y)
{
    printf("subtraction=%d \n",x-y);

}

multi(int p,int q,float r)
{


    printf("multiplication=%f \n",p*q*r);

}

void main()
{

    printf("We R in main function \n");
    int a,b;
    printf("Enter 2 value \n");
    scanf("%d%d",&a,&b);
    add(a,b,'A'); ///parameter = pass by value
    sub(a,b);
    multi(a,b,8.5);


}