How do I place the sum of the digits of a number to the left of the original number (ex: n=521 ==> sum =8 ==> n=8521) using loops in C language?
#include <stdio.h>
int main() {
int num,sum=0,i,r=0,num2=0;
printf("enter a number\n");
scanf("%d",&num);
for(i=0;num;num=num/10){
r=num%10;
sum=sum+r;
num2=num2*10+r;
}
num2=num2*10+sum;
for(i=0;num2;num2=num2/10){
r=num2%10;
num=num*10+r;
}
printf("%d",num);
}#include <stdio.h>
int main() {
int num,sum=0,i,r=0,num2=0;
printf("enter a number\n");
scanf("%d",&num);
for(i=0;num;num=num/10){
r=num%10;
sum=sum+r;
num2=num2*10+r;
}
num2=num2*10+sum;
for(i=0;num2;num2=num2/10){
r=num2%10;
num=num*10+r;
}
printf("%d",num);
}
output:-
enter a number
521
8521
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