C language binary number by bit output example

Ask questions:

1. Input int 20, whose binary value is 10100, and output 10100 by bit;

2. Or convert 1 to "+", and 0 to "-", and the output is "+ - + -";

Solutions:

int biTofh(int bi,int len){//Binary converts to plus and minus
        int i=0;
        while(i<len){
                int tmp = 1;
                if((bi & (tmp<<(len-i-1))) != 0){//Let's start with the leftmost bit, which is 1
                        printf(" + ");
                }
                else{
                        printf(" - ");
                }
                i++;    
        }
        printf("n");
        return 0;
}
int main(){
        int input[] = {1,2,3,4,5};
        biTofh(20,5);
        return 0;
}

Output results:

xu@xu-ThinkPad-X61:~/algorithm$ ./a.out
 +  -  +  -  - 
xu@xu-ThinkPad-X61:~/algorithm$