蓝桥杯练习--分解质因数

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<div class="des"><div class="pdsec">问题描述</div><div class="pdcont">　　求出区间[a,b]中所有整数的质因数分解。</div><div class="pdsec">输入格式</div><div class="pdcont">　　输入两个整数a，b。</div><div class="pdsec">输出格式</div><div class="pdcont">　　每行输出一个数的分解，形如k=a1*a2*a3...(a1<=a2<=a3...，k也是从小到大的)(具体可看样例)</div><div class="pdsec">样例输入</div><div class="pddata">3 10</div><div class="pdsec">样例输出</div><div class="pddata">3=34=2*25=56=2*37=78=2*2*29=3*310=2*5</div><div class="pdsec">提示</div><div class="pdcont">　　先筛出所有素数，然后再分解。</div><div class="pdsec">数据规模和约定</div><div class="pdcont">　　2<=a<=b<=10000</div></div>--------------------------------------------------------------------------------------------------------------------------------------------------#include<stdio.h>int main(){int a,b,i,d,c,j;scanf("%d%d",&a,&b);if(a<=b&&a>=2&&a<=10000&&b<=10000){for(i=a;i<=b;i++){d=1;for(j=2;j<i;j++)if(i%j==0)    { d=0;break;    }if(d==1)printf("%d=%d\n",i,i);else if(d==0){printf("%d=",i);j=2;c=i;while(1){while(c%j==0){printf("%d",j);c=c/j;if(c!=1)printf("*");}if(c==1){printf("\n");break;}j++;}}}}return 0;}

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