Initial programs

Source code for initial c programs

AreaAndCircumference.c

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+// To calculate Area and Circumference of a circle
+
+#include<stdio.h>
+int main()
+{
+    float r, a ,c;
+    printf("enter radius :\n");
+    scanf("%f", &r);
+    a = 3.14*r*r;
+    c = 2*3.14*r;
+    printf("Area = %f\n circumference = %f\n",a,c);
+    return 0;
+}

BasicArithmatic.c

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+// A simple arithmetic operation on two integers
+
+#include<stdio.h>
+int main()
+{
+    int n1,n2,a,s,m,d,md;
+    printf("Enter two numbers :\n");
+    scanf("%d%d",&n1,&n2);
+    a = n1+n2;
+    s = n1-n2;
+    m = n1*n2;
+    d = n1/n2;
+    md = n1%n2;
+    printf("Addition of n1 and n2 : %d\n",a);
+    printf("Subtraction of n1 and n2 : %d\n",s);
+    printf("Multiplication of n1 and n2 : %d\n",m);
+    printf("Division of n1 and n2 : %d\n",d);
+    printf("Modulo of n1 and n2 : %d\n",md);
+    return 0;
+
+}

FahrenheitToCelciusConv.c

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+// Fahrenheit to celcius temp converter
+
+#include<stdio.h>
+int main()
+{
+        float c, f;
+        printf("Enter temp in fahrenheit :\n");
+        scanf("%f", &f);
+        c = (f-32)*5/9;
+        printf("Temp in celcius is : %f",c);
+
+}

LowercaseToUppercase.c

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+// Lowercase character to Uppercase conversion
+
+#include<stdio.h>
+int main ()
+{
+    char ch;
+    int no;
+    printf("Enter a lowercase character :\n");
+    scanf("%c", &ch);
+    no = ch-32;
+    printf("Letter in capital  : %c", no);
+    return 0;
+
+
+}

SimpleInterestCalculator.c

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+//Program to calculate simple interest
+
+
+#include<stdio.h>
+int main()
+{
+    float PrincipleAmount,Rate,Time, SimpleInterest;
+    printf("Enter Principal Amount, Rate of interest and Time Respectively\n");
+    scanf("%f%f%f", &PrincipleAmount, &Rate, &Time);
+    SimpleInterest = (PrincipleAmount * Rate * Time)/ 100;
+    printf("Simple Interest is :%f",SimpleInterest);
+    return 0;
+
+}

StudentMarksPercentage.c

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+// Evaluate total, average and percentage of a student
+
+#include<stdio.h>
+int main()
+{
+    int a,b,c,d,e;
+    float total,average,percentage;
+    printf("Enter marks of 5 subjects : \n");
+    scanf("%d%d%d%d%d",&a,&b,&c,&d,&e);
+    total  = a+b+c+d+e;
+    average = total/5;
+    percentage  = (total/500)*100;
+    printf("Total marks = %f\n", total);
+    printf("Average marks = %f\n",average );
+    printf("Net percentage = %f\n",percentage);
+    return 0;
+
+}

SwapValueUsingThirdVariable.c

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+// Swap two integers using third variable
+
+
+#include<stdio.h>
+int main()
+{
+    int a,b,c;
+    printf("Enter two no :\n");
+    scanf("%d%d",&a,&b);
+    c=a;
+    a=b;
+    b=c;
+    printf("After swapping value of a = %d\n b =%d",a,b);
+    return 0;
+}

SwapValueWithoutUsingThirdVariable.c

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+// Swap two integers without using third variable
+
+
+#include<stdio.h>
+int main()
+{
+    int a, b;
+    printf("Enter two no :\n");
+    scanf("%d%d",&a,&b);
+    a = a+b;
+    b = a-b;
+    a=  a-b;
+    printf("After swapping value of a and b : %d,%d",a,b);
+    return 0;
+}

UppercaseToLowercase.c

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+// Uppercase character to lowercase character
+
+
+#include<stdio.h>
+int main()
+{
+    char a,u;
+    printf("Enter Uppercase letter :\n");
+    scanf("%c", &a);
+    u = a + 32;
+    printf("Lowercase is : %c", u);
+    return 0;
+
+}