Course Title
Fundamentals of Algorithm

* Write a function which take two integer constants and display the sum, multiplication. If both numbers are less than 100 otherwise if first number is less than 100 and second number is greater than 100 then perform the division. Please note that sum, multiplication and division logic should be in separate function.

#include<stdio.h>
#include<conio.h>

int a,b,x,y;

int sumIt(int x , int y ) { return x + y;
}

int multiplyIt(int x, int y) { return x * y;
}

int devideIt(int x, int y) { return y / x;
}

void displayIt(int a, int b) {

if (a < 100 && b < 100)
{
printf("sum is %d",sumIt(a,b)); printf("\nproduct is %d",multiplyIt(a,b));
} else if (a < 100 && b > 100)
{
printf("Devision is %d",devideIt(a,b));
} else
{
printf("No condition matches so not performing any calcuclation."); }
}

void main()
{
printf("Enter value of a and b:"); scanf("%d %d",&a,&b); displayIt(a,b);

getch();
}

* Write a program which perform following on string data * Reverse * Small to caps * Caps to small * Find a character from string * Replace a character
REVERSE:
#include<stdio.h>

int main(){ char str[50]; char rev[50]; int i=-1,j=0;

printf("Enter any string : "); scanf("%s",str); while(str[++i]!='\0');

while(i>=0) rev[j++] = str[--i];

rev[j]='\0'; printf("\nString Reversal is : %s \n",rev); return 0;
}
SMALL TO CAPS AND CAPS TO SMALL
#include <ctype.h>
#include <stdio.h>

int main(void)
{

char str[80]; int i;

printf("Enter a string: "); gets(str);

for( i = 0; str[ i ]; i++) str[ i ] = toupper( str[ i ] );

printf("%s\n", str); /* uppercase string */

for(i = 0; str[ i ]; i++) str[i] = tolower(str[ i ]);

printf("%s\n", str); /* lowercase string */

return 0;
}

FIND A CHARACTER FROM STRING

REPLACE A CHARACTER
#include<stdio.h>
#include<stdlib.h>

int main(int argc, char *argv[])
{
char string1[] = "hello";

printf("string1 %s\n", string1);

printf("string1[2] %c\n", string1[2]);

string1[2] = 'L';

printf("string1 %s\n", string1);

return 0;
}