编写C语言程序,计算由用户输入的两个分数,求它们的加,减,乘,除._百度...答:int a,b,c,d;int e,f,g;printf("input: 4/3,9/8\n");scanf("%d/%d,%d/%d",&a,&b,&c,&d);// printf("%d %d %d %d\n",a,b,c,d);e = a*d+c*b;f = b*d;g = Gcd(f,e);f = f/g; e = e/g;printf("sum: %d/%d\n",e,f);e = a*d-c*b;f = b...