完整的C程序：

#include "stdio.h"

typedef struct

{

int numerator;

int denominator;

} Fraction;

int GCD(int a,int b);

int LCM(int a,int b);

Fraction Add(Fraction f1, Fraction f2);

void main()

{

Fraction f1, f2, f3;

f1.numerator = 1;

f1.denominator = 3;

f2.numerator = 1;

f2.denominator = 6;

f3 = Add(f1, f2);

printf("%d/%d + %d/%d = %d/%d\n", f1.numerator, f1.denominator, f2.numerator, f2.denominator, f3.numerator, f3.denominator);

}

Fraction Add(Fraction f1, Fraction f2)

{

Fraction retValue;

int lcm = LCM(f1.denominator, f2.denominator);

int gcd;

retValue.denominator = lcm;

retValue.numerator = f1.numerator * lcm / f1.denominator + f2.numerator * lcm / f2.denominator;

gcd = GCD(retValue.numerator, retValue.denominator);

retValue.numerator /= gcd;

retValue.denominator /= gcd;

return retValue;

}

int GCD(int a,int b)

{

int i,temp_gcd;

for(i=a;i>=1;i--)

{

if(a%i==0)

{

if(b%i==0)

{

temp_gcd=i;

return temp_gcd;

}

}

}

}

int LCM(int a,int b)

{

int temp_lcm;

temp_lcm = a * b / GCD(a,b);

return temp_lcm;

}

完整的C程序：

#include "stdio.h"

typedef struct

{

int numerator;

int denominator;

} Fraction;

int GCD(int a,int b);

int LCM(int a,int b);

Fraction Add(Fraction f1, Fraction f2);

void main()

{

Fraction f1, f2, f3;

f1.numerator = 1;

f1.denominator = 3;

f2.numerator = 1;

f2.denominator = 6;

f3 = Add(f1, f2);

printf("%d/%d + %d/%d = %d/%d\n", f1.numerator, f1.denominator, f2.numerator, f2.denominator, f3.numerator, f3.denominator);

}

Fraction Add(Fraction f1, Fraction f2)

{

Fraction retValue;

int lcm = LCM(f1.denominator, f2.denominator);

int gcd;

retValue.denominator = lcm;

retValue.numerator = f1.numerator * lcm / f1.denominator + f2.numerator * lcm / f2.denominator;

gcd = GCD(retValue.numerator, retValue.denominator);

retValue.numerator /= gcd;

retValue.denominator /= gcd;

return retValue;

}

int GCD(int a,int b)

{

int i,temp_gcd;

for(i=a;i>=1;i--)

{

if(a%i==0)

{

if(b%i==0)

{

temp_gcd=i;

return temp_gcd;

}

}

}

}

int LCM(int a,int b)

{

int temp_lcm;

temp_lcm = a * b / GCD(a,b);

return temp_lcm;

}