对一定区间内的所有整数进行质因子分解（使用调用函数的方法）

#include<stdio.h>

void foo(unsigned n)
{
    printf("%d = 1 *", n);
    for(unsigned i = 2; i != n; ++i){
        for( ; n != i ; ){
            
            if(0 == n%i){
                printf(" %d *", i);
                n /= i;
            }else{
                break;
            }
        }
    }
    printf(" %d\n", n);
}

int main(void)
{
    for(unsigned i = 90; i <= 100; ++i){
        foo(i);
        printf("\n");
    }
   
    return 0;
}

#include <stdio.h>

void foo( unsigned n )
{
    printf( "%d = 1", n );
    for( unsigned i=2; i<=n; )
    {
        if( n%i == 0 )
        {
            printf( "*%u", i );
            n /= i;
        }
        else
            ++i;
    }
    putchar( '\n' );
}

int main( void )
{
    for( unsigned i=90; i<=100; ++i )
        foo(i);
}