Coding in c

(1) Square:put any no & get square
This programe is written in c language, using function.

#include<stdio.h>
int sq(void);
main()
{
int y;
y=sq();
printf("y=%d",y);
}int sq(void)
{
int s;
printf("enter the value\n");
scanf("%d",&s);
return (s*s);
}

(2) #include<stdio.h>
int main()
{
int i,j,r,c;
printf("entyer the vALUE\n");
scanf("%d%d",&r,&c);
for(i=0;i<=r;i++)
{
for(j=0;j<=c;j++)
{

    printf ("(%d,%d)", i, j);

}
printf ("\n");
}
return 0;
}

(3) printing pattern star:

#include<stdio.h>
main()
{
int i,j,st;
for(i=1;i<=5;i++)
{
for(j=1;j<=5-i;j++)
{
printf("-");
}for(st=1;st<=i;st++){

    printf("*");
                         }printf("\n");  
    
}
return 0;

}