4. Write a C program to interchange two numbers.

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- August 05, 2019

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,c;
printf("a=");
scanf("%d",&a);
printf("b=");
scanf("%d",&b);
printf("Before interchange a=%d b=%d\n",a,b);
c=a;
a=b;
b=c;
printf("After interchange a=%d b=%d",a,b);
getch();
}

#Output:

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23. Read five persons height and weight and count the number of person having height greater than 170 and weight less than 50,

- September 06, 2019

#include<stdio.h> #include<conio.h> void main() { int i,j,str[5][2],count=0; printf("Enter Height and Weight:\n"); for(i=0;i<5;i++) { for(j=0;j<2;j++) { scanf("%d",&str[i][j]); } } for(i=0;i<5;i++) { for(j=0;j<2;j++) { if(str[i][0]>=170 && str[i][j]<=50) { count++; } } } printf("Number of Students= %d",count); getch(); } #OUTPUT:

11. Write a C program to check whether the entered character is capital, small letter, digit or any special character.

- August 10, 2019

#include<stdio.h> #include<conio.h> void main() { char ch; printf("Enter any character="); scanf("%c",&ch); if(ch>='a' && ch<='z') printf("%c is a small letter",ch); else if(ch>='A' && ch<='Z') printf("%c is Capital letter",ch); else if(ch>='0' && ch<='9') printf("%c is a Numeric",ch); else printf("%c is a Special Character",ch); getch(); } #OUTPUT:

25. Write a program to evaluate the series 1^2+2^2+3^2+……+n^2

- September 08, 2019

#include<stdio.h> #include<conio.h> #include<math.h> /* Here we are using math.h header file because we are using pow function under this header file. */ void main() { int i,n,sum=0; printf("Enter your Numbers: "); scanf("%d",&n); for(i=1;i<=n;i++) { sum=sum+pow(i,2); } printf("Sum=%d",sum); getch(); } #OUTPUT:

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