将一个正整数分解为质因数例如 输入90 打印90=2*3*3*5

#include <stdio.h>

int main(){
    int n,i,s;
    scanf("%d",&s);
    if(s<3) {printf("%d=%d",n,n);return 0;}
    n=s;
    printf("%d=",n);
    for(i=2;i<=s;i++){
        while(!(n%i)){
            if(n/i==1) {printf("%d\n",n); return;}
            printf("%d*",i);
            n/=i;   

            }
    }
}