Program to swap two numbers using third variable
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Program:
#include<stdio.h>
int main()
{int a,b,temp;
printf("Enter a=");
scanf ("%d",&a);
printf("Enter b=");
scanf("%d",&b);
printf("Before Swapping:\n");
printf("a=%d\nb=%d",a,b);
temp=a;
a=b;
b=temp;
printf("\nAfter Swapping:");
printf("\na=%d\nb=%d",a,b);
return 0;
}
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#basicprograms

Program to swap two numbers without using third variable
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Program:
#include<stdio.h>
int main()
{int a,b;
printf("Enter a=");
scanf ("%d",&a);
printf("Enter b=");
scanf("%d",&b);
printf("Before Swapping:\n");
printf("a=%d\nb=%d",a,b);
a=a+b;
b=a-b;
a=a-b;
printf("\nAfter Swapping:");
printf("\na=%d\nb=%d",a,b); return 0;
}
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#basicprograms

Program to calculate average of two numbers and print their deviation
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Program:
#include<stdio.h>
int main()
{int a,b;
float avg,d1,d2;
printf("Enter first number=");
scanf ("%d",&a);
printf("Enter second number=");
scanf("%d",&b);
avg=(a+b)/2;
d1=a-avg;
d2=b-avg;
printf("Average=%.2f\n",avg);
printf("Deviation of 1st number (i.e %d) is=%.2f",a,d1);
printf("\nDeviation of 2nd number (i.e %d) is=%.2f",b,d2);
return 0;
}
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#basicprograms

Program to know the size of data type
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Program:
#include<stdio.h>
int main()
{
printf("Size of int:%d bytes\n",sizeof(int));
printf("Size of float:%d bytes\n",sizeof(float));
printf("Size of char:%d bytes\n",sizeof(char));
printf("Size of double:%d bytes\n",sizeof(double));
return 0;
}
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#basicprograms

Program to convert floating point number into int.
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Program:
#include<stdio.h>
int main()
{float a;
int b;
printf("enter floating point number:");
scanf("%f",&a);
b=(int)a;
printf("%d",b);
return 0;
}
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#basicprograms