自分で書いたものと、コンパイルエラー表示は以下です。
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#include <stdio.h>
#include <stdlib.h>
int main(void){
FILE *fp;
int da[i];
double hi[i];
double lo[i];
int i, j, max, min;

if ((fp = fopen("Temp.dat","r"))==NULL) {
printf("file open error!!\n");
exit(1);
}


fscanf(fp)"%d %lf %lf",&d, &f, &g";


for (i = 0; i < (n-1); ++i) {
x = data[i];
max = i;
for (j = i + 1; j < n; j++) {
if (data[max] < data[j]) {
max = j;
}
}
printf("最高気温, 日付＝%d\n, %d\n" hi[max], max);



for (i = 0; i < (n-1); ++i) {
x = data[i];
min = i;
for (j = i + 1; j < n; j++) {
if (data[min] > data[j]) {
min = j;
}
}
printf("最低気温, 日付＝%d\n, %d\n" low[min], min);

fclose(fp);
}

9-1.c:40:35: missing terminating " character
9-1.c:17:34: possible start of unterminated string literal
9-1.c:36:35: missing terminating " character
9-1.c:13:34: possible start of unterminated string literal