17.write a programme using integer with (-)

#include<stdio.h>
main()
{
int a,b,c,;
a=20;
b=3;
c=a-b;
printf("%d",c);
getch();
}

OUTPUT

18. Write a programme using integer with (*)

#include<stdio.h>
main()
{
int a,b,c,;
a=20;
b=3;
c=a*b;
printf("%d",c);
getch();
}

OUTPUT

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