/*decimal to binary*/
#include <stdio.h>
int main() {
	int dec;
	int hold=0;
	printf("decimal number : ");
	scanf("%d",&dec);
 
	hold=dec%2;
 
	while (hold!=1){
		if (hold == 0){
			printf("0");
		}else if(hold >1){
			printf("1");
		}else{
			printf("1");
		}
		hold=hold%2;
	}
}

/*decimal to binary*/
#include <stdio.h>
 
void printBinary(const unsigned char val) {
 
  for(int i = 7; i >= 0; i--)
 
    if(val & (1 << i))
 
     printf("1");
 
    else
 
      printf("0");
  printf("\n");
 
} 
 
int main() {
	int dec;
	int hold=0;
	printf("Integer number : ");
	scanf("%d",&dec);
	printBinary((unsigned char)dec);	
}

#include <stdio.h>
 
void bin_c(int x);
 
int main(){
	int x;
	printf("Enter a number:");
	scanf("%d",x);
 
	bin_c(x);
	return 0;
}
 
void bin_c(int x){
 
	if (x == 1){
		printf("1");
	}
 
	while (x!=1){
		int y;
		y=x/2;
		if (y == 0){
			printf("0");
		}
		if (y > 1){
			printf("1");
		}
		if (y == 1){
			printf("1");
		}
		bin_c(y);
	}
 
}