C语言 分母有乘法,可计算分数加减乘除的代码

C/C++ codeint zg(int x, int y) //求最大公约数

{

int temp = x < y ? x : y;

int flag;

for (int i = 1; i <= temp; i++)

{

if (x%i == 0 && y%i == 0)

{

flag = i;

}

}

return flag;

}

//a 第一个数的分子

//b 第一个数的分母

//c 第二个数的分子

//d 第二个数的分母

int js (int a, int b, int c, int d, char ch)

{

int x, y , m, n;

int iResult;

if (ch == '+')

{

x = a * d;

y = b * d;

m = c * b;

n = d * b;

iResult = (x + m)/y;

int i = zg(x + m, y);

printf("%d/%d", (x + m)/i, y/i);

}

else if (ch == '-')

{

x = a * d;

y = b * d;

m = c * b;

n = d * b;

iResult = (x - m)/y;

int i = zg(x - m > 0 ? x - m : m - x, y);

printf("%d/%d", (x - m)/i, y/i);

}

else if (ch == '*')

{

iResult = (a * c)/(b * d);

int i = zg(a * c, b * d);

printf("%d/%d", (a * c)/i, (b * d)/i);

}

else if (ch == '/')

{

iResult = (a * d)/(b * c);

int i = zg(a * d, b * c);

printf("%d/%d", (a * d)/i, (b * c)/i);

}

return 0;

}