Starting Programming on C

1. Calculation of Simple interest 
   
   #include<stdio.h>

   int main(){

   int p,n;

   float r,si;

   
   

   printf("Enter principal:");

   scanf("%d",&p);

   printf("Enter Rate:");

   scanf("%f",&r);

   printf("Enter time:");

   scanf("%d",&n);

   
   

   si=(p*n*r)/100;

   
   

   printf("Interest is:%f",si);

   
   
   

   return 0;

   }
   
   
   
   
   
   
   
   
   
2.  Ramesh's basic salary is input through the keyboard. His dearness allowance is 40% of basic salary and rent allowance is 20% of his basic salary. Write a basic program to calculate his Gross Salary.
   
   #include<stdio.h>

   int main(){

   int basic_salary, house_rent_allowance,dearness_allowance, gross_salary;

   
   

   printf("Enter Basic Salary:");

   scanf("%d",&basic_salary);

   
   

   dearness_allowance=basic_salary*40/100;

   house_rent_allowance=basic_salary*20/100;

   gross_salary=basic_salary+dearness_allowance+house_rent_allowance;

   
   

   printf("His Dearness allowance is :%d\n",dearness_allowance);

   printf("His House Rent allowance is :%d\n",house_rent_allowance);

   printf("His Gross Salary is :%d\n",gross_salary);

   
   

   return 0;

   }
   
   
   
   

   
   

   
   
3. The Distance between two cities (in Km) is input through the keyboard. Write a program to convert and print this distance in meters, feet, inch and centimeter.
   
   #include<stdio.h>

   int main(){

       int distance,m,f, i,cm;

   printf("Enter Distance between two Cities (in KM):");

   scanf("%d",&distance);

   m=distance*1000;

   f=distance*3280.84;

   i=distance*39370.1;

   cm=distance*100000;

   
   

   printf("Distance in Meter:%d meter\n",m);

   printf("Distance in Feet:%d feet\n",f);

   printf("Distance in Inch:%d inch\n",i);

   printf("Distance in CM:%d Centimeter\n",cm);

   
   
   

   return 0;

   }
   
   
   
   
   
   
   
4.  If the marks obtained by a student in five different subjects are input through keyboard, write a program to find out the aggregate marks and percentage marks obtained by the student. Assume that the maximum marks that can be obtained by a student.
   
   #include<stdio.h>

   int main(){

       int sub1,sub2,sub3,sub4,sub5,total,percentage;

   printf("Enter Marks for Subject1:");

   scanf("%d",&sub1);

   printf("Enter Marks for Subject2:");

   scanf("%d",&sub2);

   printf("Enter Marks for Subject3:");

   scanf("%d",&sub3);

   printf("Enter Marks for Subject4:");

   scanf("%d",&sub4);

   printf("Enter Marks for Subject5:");

   scanf("%d",&sub5);

   total=sub1+sub2+sub3+sub4+sub5;

   percentage=1.00*total/500*100; /*Converting it into integer to float*/

   
   

   printf("Total Marks:%d\n",total);

   printf("Percentage:%d\n",percentage);

   
   
   
   
   

   return 0;

   }
   
   
   
   
   
   
   
5. Temperature of a city in Centigrade  degree is input through the keyboard. Write a a program to convert this temperature into Fahrenheit.
   
   
   #include<stdio.h>

   int main(){

   int deg,fah;

   printf("Enter temperature in degree:");

   scanf("%d",&deg);

   
   

   fah=1.0*(deg*9/5)+32;

   printf("Fahrenheit degree:%d",fah);

   return 0;

   }
   
   
   
   
   
   
   
   
   
   
   
   
   
   
6. The length and breadth of a rectangle and radius of a circle are input through the keyboard. Write a program to calculate the area and perimeter of a rectangle.
   
   #include<stdio.h>

   #include<math.h>

   int const pi=22/7;

   int main(){

   int length,breadth,radius,area1, area2;

   printf("Enter length and breadth of rectangle:");

   scanf("%d%d",&length,&breadth);

   
   

   printf("Enter radius of Circle:");

   scanf("%d",&radius);

   
   

   area1=length*breadth;

   area2= pi*pow(pi,2);

   
   

   printf("Area of Rectangle:%d\n",area1);

   printf("Area of Circle:%d",area2);

   
   
   

   return 0;

   }