//main.c
1.#include <stdio.h>
2.#include "fract.h"
3. 
4. 
5. 
6.int main() {
7.    int num1, deno1, num2, deno2;
8.    printf("\nEnter fraction 1: numerator denominator:");
9.    scanf("%d%d", &num1, &deno1);
10.    printf("\nEnter fraction 2: numerator denominator:");
11.    scanf("%d%d", &num2, &deno2);
12. 
13.    Fract f1 = {num1, deno1};
14.    Fract f2 = {num2, deno2};
15.    Fract result = sum(f1, f2);
16.    printf("\nResult=%d/%d", result.num, result.deno);
17. 
18.    return 0;
19.}
20. 

 1 //fract.h
 2 typedef struct node {
 3     int num;
 4     int deno;
 5     }Fract;
 6 Fract sum(Fract number1, Fract number2) {
 7     number1.num *= number2.deno;
 8     number2.num *= number1.deno;
 9     number1.deno *= number2.deno;
10     number2.deno *= number1.deno;
11     Fract sum;
12     sum.deno = number1.deno;
13     sum.num = number1.num + number2.num;
14     return sum;
15 }

//标程
1.#ifndef Header_h
2.#define Header_h
3. 
4.typedef struct {
5.    int num;
6.    int deno;
7.} Fract;
8. 
9.Fract sum(Fract f1, Fract f2) {
10.    Fract result = {(f1.num * f2.deno) + (f2.num * f1.deno), f1.deno * f2.deno};
11.    return result;
12.}
13. 
14. 
15.#endif /* Header_h */