在c中打印出字符串

Question

所需的输出：

Student 99704 exam1 97 exam2 64 exam3 61 grade C 

而是得到：

Student 991704,97,64,61,C exam1 0 exam2 4195335 exam3 &d ((null)) on class.

打印出阵列可能需要for循环吗？

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void flushScanf();
int main(void)
{
#if 0
    char str[10];
    printf("Enter a string: ");
    scanf("%9[^\n]", str);
    flushScanf();
    printf("%s", str);
#endif
    FILE* f = fopen("grades.csv", "r");
    if (f == NULL) {
        fprintf(stderr, "Error opening file test.dat.");
        exit(1);
    }
    ///////
    char line[65];
    char studentID[26];
    char grade[8];
    int exam1, exam2, exam3;

    while (fgets(line, sizeof(line), f) != NULL){
        sscanf(line,
               "%25[^\n], %*s, %d, %d, %d, %s",
               studentID, &exam1, &exam2, &exam3, grade);
        printf("Student %s exam1 %d exam2 %d exam3 &d (%s) on class.\n",
               studentID, exam1, exam2, exam3, grade);
    }
    if (fclose(f) == EOF){
        fprintf(stderr, "Error closing file test.dat.");
        exit(2);
    }
    return 0;
}
void flushScanf()
{
    while (getchar() != '\n')
        ;
}