1.计算目标 计算复数z=3+4i的模 2.编写程序 #include<stdio.h>#include<gsl/gsl_math.h>#include<gsl/gsl_complex.h>#include<gsl/gsl_complex_math.h>#include<gsl/gsl_sf_bessel.h>intmain(void){gsl_complex z;doublex=-3.0;doubley=4.0;GSL_SET_COMPLEX(&z,x,y);//设置复数z=3+4iprintf(...