Question

我是C编程的新手。我只是弄清楚如何通过struct将csv文件读入C，但是努力将脚本转换为函数，然后在int main（）中调用此函数。我需要读取大量的csv文件，这样函数才会非常有用。

这是我的代码成功运行（非功能版本）：

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


#define MAXROWS 2

struct cudaScenarioStruct{
    char *type;
    int trial;
    int yPC;
    int yPE;
    int n;
};

struct cudaScenarioStruct cudaScenario[MAXROWS];


int main(){
int rowIndex = 0;
char line[128];
char* token = NULL;
FILE* fp = fopen("C:/Users/ms710557/Desktop/cudaScenario1(2).csv","r");
if (fp != NULL){
    while (fgets( line, sizeof(line), fp) != NULL && rowIndex < MAXROWS){

        cudaScenario[rowIndex].type = malloc(2);
        token = strtok(line, ",");
        strcpy(cudaScenario[rowIndex].type, token);

        token = strtok(NULL, ",");
        cudaScenario[rowIndex].trial = atoi(token);

        token = strtok(NULL, ",");
        cudaScenario[rowIndex].yPC = atoi(token);

        token = strtok(NULL, ",");
        cudaScenario[rowIndex].yPE = atoi(token);

        token = strtok(NULL, ",");
        cudaScenario[rowIndex].n = atoi(token);

        rowIndex++;
    }
    fclose(fp);
}

for (int i = 0; i < MAXROWS; ++i){
    printf("%s, %i, %i, %i, %i \n", cudaScenario[i].type, cudaScenario[i].trial, cudaScenario[i].yPC, cudaScenario[i].yPE, cudaScenario[i].n);
}

return 0;
}

结果如下：

NI, 1, 61, 55, 80 
NI, 2, 54, 59, 80

然而，当我将它转换为函数并将函数包含在int main（）中时，它只是不起作用...我已经谷歌搜索了几个小时但无法找到原因。这是我的尝试：

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

#define MAXROWS 2

struct cudaScenarioStruct{
    char *type;
    int trial;
    int yPC;
    int yPE;
    int n;
};


struct cudaScenarioStruct *readCudaScenarioData(){
    struct cudaScenarioStruct csvData[MAXROWS];

    int rowIndex = 0;
    char line[128];
    char* token = NULL;
    FILE* fp = fopen("C:/Users/ms710557/Desktop/cudaScenario1(2).csv","r");
    if (fp != NULL){
        while (fgets( line, sizeof(line), fp) != NULL && rowIndex < MAXROWS){

            csvData[rowIndex].type = malloc(2);
            token = strtok(line, ",");
            strcpy(csvData[rowIndex].type, token);

            token = strtok(NULL, ",");
            csvData[rowIndex].trial = atoi(token);

            token = strtok(NULL, ",");
            csvData[rowIndex].yPC = atoi(token);

            token = strtok(NULL, ",");
            csvData[rowIndex].yPE = atoi(token);

            token = strtok(NULL, ",");
            csvData[rowIndex].n = atoi(token);
            rowIndex++;
        }
        fclose(fp);
    }

    return csvData;
}




int main()
{

    struct cudaScenarioStruct *cudaScenario;
    cudaScenario = readCudaScenarioData();

    for (int i = 0; i < MAXROWS; ++i){
        printf("%s, %i, %i, %i, %i \n", cudaScenario[i].type, 
cudaScenario[i].trial, cudaScenario[i].yPC, cudaScenario[i].yPE, 
cudaScenario[i].n);
    }

    return 0;
}

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将main（）中的struct转换为函数版本

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