分数四则运算

/* 功能：分数四则运算 日期：2013-05-11 */ #include <stdio.h> #include <stdlib.h> #include <math.h> int main(void) { int first1,first2,second1,second2; int i,n,p; printf(“请输入两个分数(用逗号隔开)：”); scanf(“%d/%d,%d/%d”,&first1,&first2,&second1,&second2); if (0 == first2|| 0 ==second2) { printf(“分母不可以为0！”); } else { i = abs(first1 * second1); n = first2 * second2; p = abs(first2 * second1); //和 while (n>0) { if(0==((first1 * second2 + second1 * first2) % n + (first2 * second2) % n)) { if ((first1 * second2 + second1 * first2)==(first2 * second2)) { printf(“和为：1n”); break; } else if (0 == (first1 * second2 + second1 * first2) ) { printf(“和为：0n”); break; } else { printf(“和为：%d/&dn”,(first1 * second2 + second1 * first2) % n,(first2 * second2) % n); break; } } n—; } //差 while (n>0) { if(0==((first1 * second2 - second1 * first2) % n + (first2 * second2) % n)) { if ((first1 * second2 - second1 * first2)==(first2 * second2)) { printf(“差为：1n”); break; } else if (0 == (first1 * second2 - second1 * first2) ) { printf(“差为：0n”); break; } else { printf(“差为：%d/&dn”,(first1 * second2 - second1 * first2) % n,(first2 * second2) % n); break; } } n—; } //积 while (i>0) { if(0==((first1 * second1) % i + (first2 * second2) % i)) { if ((first1 * second1)==(first2 * second2)) { printf(“积为：1n”); break; } else { printf(“积为：%d/&dn”,(first1 * second1 ) % i,(first2 * second2) % i); break; } } i—; } //商 while (p>0) { if(0==((first1 * second2) % p + (first2 * second1) % p)) { if ((first1 * second2)==(first2 * second1)) { printf(“积为：1n”); break; } else { printf(“积为：%d/&dn”,(first1 * second2 ) % p,(first2 * second1) % p); break; } } p—; } } system(“pause”); return 0; }