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  1. #include<stdio.h>
  2. #include<complex.h>
  3.  
  4.  
  5. #define N 100
  6. double ToNum(char *c);
  7.  
  8.  
  9. int main(){
  10.  
  11. double complex z1, z2, z3;
  12. char c1[N], c2[N];
  13. char *p = c1;
  14. char op;
  15. double imag, real,op1, op2;
  16.  
  17. scanf("%s%s%c", c1, c2, &op);
  18.  
  19.     real = ToNum(c1);
  20.     while (*p != '+' && *p != '-')
  21.         p++;
  22.     op1= *p == '+' ? 1 : -1;
  23.     imag = ToNum(++p);
  24.     imag *= op1;
  25.     z1 = real+imag*I;
  26.  
  27.     real = ToNum(c2);
  28.     while (*p != '+' && *p != '-')
  29.         p++;
  30.     op2 = *p == '+' ? 1 : -1;
  31.     imag = ToNum(++p);
  32.     imag *= op2;
  33.     z2 = real + imag*I;
  34.  
  35.  
  36.     if (op == '+')
  37.     z3 = z1 + z2;
  38.     else if (op == '-')
  39.     z3 = z1 - z2;
  40.     else if (op == '*')
  41.     z3 = z1*z2;
  42.     else if (op == '/')
  43.     z3 = z1 / z2;
  44.  
  45.     printf("%lf%+lfi\n", creal(z3), cimag(z3));
  46.  
  47. return 0;
  48. }
  49.  
  50. double ToNum(char *c)
  51. {
  52. double num = 0; 
  53. num = atof(c);
  54. return num;
  55. }
Compilation error #stdin compilation error #stdout 0s 2256KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.c: In function ‘ToNum’:
prog.c:53:1: error: implicit declaration of function ‘atof’ [-Werror=implicit-function-declaration]
 num = atof(c);
 ^
cc1: all warnings being treated as errors
stdout
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Standard output is empty
https://ideone.com/5wiHB6
language:
C99 (gcc 8.3)
created:
9 years ago
visibility:
secret

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