#include "stdio.h"
typedef.struct
{
    float read,imag;
}complex;
 complex sub(complex fs1,complex fs2)
{
    complex fs3;
    fs3.read=fs1.read-fs2.read;
    fs3.imag=fs1.imag-fs2.imag;
    return fs3;
}

main()
{
    complex fs1,,fs2,fs3;
    float a,b,c,d;
    printf("输入复数FS1实虚部：、\n");
        scanf("%f%f",&a,&b);
    fs1.read=a;
    fs1.imag=b;
    printf("输入复数FS2实虚部：\n");
    scanf("%f%f',&c,&d);
        fs2.read=c;
    fs2.imag=d;
    printf("所输入的两复数分别为：\n");
    printf("fs1=%f+%fi",fs1.read,fs2.imag);
    printf("fs2=%f+%fi",fs2.read,fs2.imag);
    fs3=sub(fs1,fs2);
    printf("fs3=fs1-fs2=%f+%fi",fs3.read,fs3.imag);
}

高手帮忙看一下！谢谢！

那个是我发帖时写错的，编译后检查时提示是红色处出错误，但我不知怎么个错法……
#include "stdio.h"
typedef.struct
{
    float read,imag;
}complex;
complex sub(complex fs1,complex fs2)
{
    complex fs3;
    fs3.read=fs1.read-fs2.read;
    fs3.imag=fs1.imag-fs2.imag;
    return fs3;
}

main()
{
    complex fs1,,fs2,fs3;
    float a,b,c,d;
    printf("输入复数FS1实虚部：、\n");
        scanf("%f%f",&a,&b);
    fs1.read=a;
    fs1.imag=b;
    printf("输入复数FS2实虚部：\n");
    scanf("%f%f',&c,&d);
        fs2.read=c;
    fs2.imag=d;
    printf("所输入的两复数分别为：\n");
    printf("fs1=%f+%fi",fs1.read,fs2.imag);
    printf("fs2=%f+%fi",fs2.read,fs2.imag);
    fs3=sub(fs1,fs2);
    printf("fs3=fs1-fs2=%f+%fi",fs3.read,fs3.imag);
}