我爲FCFS調度編寫了下面的代碼。 問題是此代碼編譯正常,但執行./a.out
後,沒有顯示任何內容,程序卡住了。它甚至不打印在main()
開頭的"Reading"
printf
聲明。問題是什麼?C程序卡住了,甚至沒有輸入主體
#include <stdio.h>
struct process
{
int at;
int bt;
int wt;
int tt;
int rt;
char pid[5];
} p[5];
int i, j;
int n = 0;
void main()
{
printf("Reading");
FILE *fp;
fp = fopen("in1.txt", "r");
char sample;
if (fp != NULL)
{
sample = getc(fp);
while (sample != EOF);
{
if (sample == '\n')
n++;
sample = getc(fp);
}
fseek(fp, 0, 0);
for (i = 0; i < n; i++)
{
fscanf(fp, "%s %d %d", p[i].pid, &p[i].at, &p[i].bt);
p[i].wt = p[i].tt = 0;
p[i].rt = p[i].bt;
}
fclose(fp);
}
//sorta();
printf("\nGantt Chart for FCFS\n");
int t = 0;
int avgw = 0;
int avgt = 0;
printf("%d ", t);
for (i = 0; i < n; i++)
{
if (p[i].at > t)
{
printf("%d ", t);
t = p[i].at;
}
p[i].wt = t - p[i].at;
avgw = avgw + p[i].wt;
printf("%s ", p[i].pid);
p[i].tt = p[i].bt + p[i].wt;
avgt = avgt + p[i].tt;
t = t + p[i].bt;
printf("%d ", t);
printf("\navg waiting time = %d", avgw/n);
printf("\navg turn around time = %d", avgt/n);
}
}
它是打印: 閱讀 甘特圖表先到先得什麼編譯你正在用嗎? – Lohit
小備註:'p [5]'後來''從'0'運行到'n-1',可能超過'4',會導致緩衝區溢出,任何文件都有足夠的線。 –
請在發佈之前縮進您的代碼。 – Lundin