Question

我正在写一个遗传算法，我在打印一些结构变量时遇到了问题。我知道代码正确读取它们因为我得到了一个结果但是当我尝试在屏幕上或文件中打印它们时得到零...

这是我正在使用的代码，请你帮帮我...... ??

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define POPSIZE 50
#define MAXGENS 1000
#define NVARS 3
#define PXOVER 0.8
#define PMUTATION 0.15
#define B 2
#define TOURNAMENT_SIZE 2
#define TRUE 1
#define FALSE 0

int generation ;
int cur_best;
FILE *galog_tournament;

struct genotype
{
    double gene[NVARS];
    double fitness;
    double upper[NVARS];
    double lower[NVARS];
    double cfitness;
    double rfitness;
};

struct genotype population[POPSIZE+1];
struct genotype newpopulation[POPSIZE+1];


void initialize(void);
double randval(double,double);
void evaluate(void);
void keep_the_best(void);
void elitist(void);
void tournament_selection(void);
void crossover(void);
void random_Xover(int,int);
void swap(double *,double *);
void non_uniform_mutation(void);
void report(void);
double delta2(int,int);


void initialize(void)
{
    FILE *infile;
    FILE *bounds;
    FILE *popu;
    int i,j;
    double lbound,ubound;

    bounds = fopen("bounds.txt","w");
    popu = fopen("population.txt","w");


    if((infile = fopen("gadata.txt","r"))== NULL)
    {
        fprintf(galog_tournament,"\n Cannot open input file\n");
        exit(1);
    }


    for(i = 0; i < NVARS; i++)
    {
        fscanf(infile, "%lf",&lbound);
        fscanf(infile, "%lf",&ubound);

        printf("%lf  %lf\n",lbound,ubound);

        for(j = 0; j < NVARS; j++)
            {
                population[j].fitness = 0;
                population[j].rfitness = 0;
                population[j].cfitness = 0;
                population[j].lower[i] = lbound;
                population[j].upper[i] = ubound;

                fprintf(bounds,"%lf  %lf\n",&population[j].lower[i],&population[j].upper[i]);

                population[j].gene[i] = randval(population[j].lower[i],population[j].upper[i]);

                fprintf(popu,"%lf\n",population[j].gene[i]);
            }

    }
    fclose(infile);
    fclose(bounds);
    fclose(popu);
}

伙计们非常感谢你帮助我实际上我试图调试代码并稍微更改它以便在屏幕上打印值..不幸的是我仍然得到零... !!这是代码和输入文件的下限和上限

void initialize(void)
{
    FILE *infile;
    FILE *test;
    int i,j;
    double lbound,ubound;

    test = fopen("test.txt","w");



    if((infile = fopen("gadata.txt","r"))== NULL)
    {
        fprintf(galog_tournament,"\n Cannot open input file\n");
        exit(1);
    }


    for(i = 0; i < NVARS; i++)
    {
        fscanf(infile, "%lf",&lbound);
        fscanf(infile, "%lf",&ubound);

         printf("%lf  %lf\n",lbound,ubound);


    for (j=0; j < POPSIZE; j++) {
        population[j].fitness = 0;
        population[j].rfitness = 0;
        population[j].cfitness = 0;
        population[j].lower[i] = lbound;
        population[j].upper[i] = ubound;
        population[j].gene[i] = randval(population[j].lower[i],
                                        population[j].upper[i]);






     }


  }

    fclose(infile);
    fclose(test);

}






   0.000000 0.000000
    0.000514    0.010514
    0.011307    0.021307
    0.021876    0.031876
    0.033994    0.043994
    0.043272    0.053272
    0.050229    0.060229
    0.053976    0.063976
    0.053803    0.063803
    0.046640    0.056640
    0.029907    0.039907
    0.017619    0.027619
    0.002316    0.012316
    -0.005428   0.004572
    -0.00683    0.00317
    -0.009743   0.000257
    -0.10582    -0.09582
    -0.026304   -0.016304
    -0.027064   -0.017064
    -0.025243   -0.015243
    -0.022386   -0.012386
    -0.019108   -0.009108
    -0.015788   -0.005788
    -0.012185   -0.002185
    -0.009452   0.000548
    -0.052133   0.002867
    -0.006128   0.003872
    0.000000    0.000000

Answer 1

从

中删除&

fprintf(bounds,"%lf  %lf\n",&population[j].lower[i],&population[j].upper[i]);

所以它变成了：

fprintf(bounds,"%lf  %lf\n",population[j].lower[i],population[j].upper[i]);

您希望打印变量的值而不是该变量的地址。

将编译器设置为显示警告，在这种情况下，它会告诉您有关问题的信息。

Answer 2

如果fScanf没有读取任何内容并返回0，你可能不希望你的代码运行。为什么不把它改成像

这样的东西

while( 0 != fscanf(infile, "%lf",&ubound))
{
    if(0 == fscanf(infile, "%lf",&lbound) || i >= NVARS)      
       {
       return 0; 
       }
    else
       {
       printf("%lf  %lf\n",lbound,ubound);
       i++
       }
}

然后，如果它打印任何东西你知道你不用fscanf扫描任何东西。如果你的scanf不读任何东西，我猜你不想继续用0填充你的数组，它会合理地指出你的方向错误

结构变量打印

2 个答案: