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  1. /*======================================================
  2. //函數名：c_comp_product
  3. //功能描述：求複數的乘法
  4. //輸入參數：a1（第一個乘數a的結構體）
  5. //　　　　　a2（第二個乘數b的結構體）
  6. //　　　　　c（計算結果的結構體）
  7. //返回值：0（失敗），1（成功）
  8. =========================================================*/
  9. #include "stdio.h"
  10. #include "stdlib.h"
  11. #include "math.h"
  12. struct c_comp{
  13.         double rmz;
  14.         double imz;
  15. }c_comp;
  16. int c_comp_product(a1,a2,c)
  17. struct c_comp *a1,*a2,*c;
  18. {
  19.         double p,q,s;
  20.         if(a1 == NULL || a2 == NULL || c == NULL)
  21.         {
  22.                 printf("(c_comp_product)The c_comp pointer is NULL!\n");
  23.                 return(0);
  24.         }
  25.         p = a1->rmz*a2->rmz;
  26.         q = a1->imz*a2->imz;
  27.         s = (a1->rmz + a1->imz)*(a2->rmz + a2->imz);
  28.         c->rmz = p - q;
  29.         c->imz = s - p - q;
  30.         return(1);
  31. }
  32.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
/usr/lib/gcc/i486-linux-gnu/4.8/../../../i386-linux-gnu/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout 
Standard output is empty
https://ideone.com/m2LeIL
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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