Pending COA Lab

#include<stdio.h>
#include<math.h>
void dec2bin(int ans[],int dec){
int i=0;
int j=0;
int a[100];
int rem;
while(dec!=0){
rem = dec%2;
ans[i]=rem;
dec= dec/2;
i++;
}
i=i-1;
for ( j=0;j<=i;j++){
a[j]=ans[i-j];
}
printf("\n");
for (j=0;j<=i;j++){
printf("%d",a[j]);
}
printf("\n");
}
int rpow(int power){
	int i,finalVal=1;
	for(i=1;i<=power;i++){
	finalVal=finalVal*2;
	}
	return finalVal;
}
void bin2dec(int bin[],int n){
int i,useBin[100];
int dec=0;
n=n-1;
for(i=0;i<=n;i++){
useBin[i]=bin[n-i];
}
for(i=0;i<=n;i++){
dec = dec*10+useBin[i]*rpow(n);
}
printf("\n");
printf("The Decimal Value is %d",dec);
}
int main(void){
int decToBinVal[100],count,binVal[100],binBit,i;
int dec;
printf("Enter The Decimal Value\n");
scanf("%d",&dec);
dec2bin(decToBinVal,dec);
printf("Enter the No. Of Bits Of the Binary Value\n");
scanf("%d",&binBit);
printf("Enter The Binary Value\n");
for(i=0;i<binBit;i++){
	scanf("%d",&binVal[i]);
}
bin2dec(binVal,binBit);
return 0;
}