C囂冱鯉塀晒響亟猟周
<貧匯准
和匯准>
fscanf() 才 fprintf() 痕方嚥念中聞喘議 scanf() 才 printf() 孔嬬屢貌?脅頁鯉塀晒響亟痕方?曾宀議曝艶壓噐 fscanf() 才 fprintf() 議響亟斤嵆音頁囚徒才?塋焼?ii畯粘電摸勅顗?
宸曾倖痕方議圻侏葎?
‐幣箭/喘 fscanf 才 fprintf 痕方栖頼撹斤僥伏佚連議響亟。
泌惚繍 fp 譜崔葎 stdin?椎担 fscanf() 痕方繍氏貫囚徒響函方象?嚥 scanf 議恬喘屢揖?譜崔葎 stdout?椎担 fprintf() 痕方繍氏??塋焼烘箜歧敞檻s? printf 議恬喘屢揖。箭泌?
Input two numbers: 10 20?L
sum=30
宸曾倖痕方議圻侏葎?
int fscanf ( FILE *fp, char * format, ... ); int fprintf ( FILE *fp, char * format, ... );fp 葎猟周峺寞?format 葎鯉塀陣崙忖憲堪?... 燕幣歌方双燕。嚥 scanf() 才 printf() 屢曳?万断叙叙謹阻匯倖 fp 歌方。箭泌?
FILE *fp; int i, j; char *str, ch; fscanf(fp, "%d %s", &i, str); fprintf(fp,"%d %c", j, ch);fprintf() 卦指撹孔亟秘議忖憲議倖方?払移夸卦指減方。fscanf() 卦指歌方双燕嶄瓜撹孔験峙議歌方倖方。
‐幣箭/喘 fscanf 才 fprintf 痕方栖頼撹斤僥伏佚連議響亟。
#include<stdio.h>
#define N 2
struct stu{
char name[10];
int num;
int age;
float score;
} boya[N], boyb[N], *pa, *pb;
int main(){
FILE *fp;
int i;
pa=boya;
pb=boyb;
if( (fp=fopen("D:\\demo.txt","wt+")) == NULL ){
printf("Cannot open file, press any key exit!");
getch();
exit(1);
}
//貫囚徒響秘方象?隠贋欺boya
printf("Input data:\n");
for(i=0; i<N; i++,pa++){
scanf("%s %d %d %f", pa->name, &pa->num, &pa->age, &pa->score);
}
pa = boya;
//繍boya嶄議方象亟秘欺猟周
for(i=0; i<N; i++,pa++){
fprintf(fp,"%s %d %d %f\n", pa->name, pa->num, pa->age, pa->score);
}
//嶷崔猟周峺寞
rewind(fp);
//貫猟周嶄響函方象?隠贋欺boyb
for(i=0; i<N; i++,pb++){
fscanf(fp, "%s %d %d %f\n", pb->name, &pb->num, &pb->age, &pb->score);
}
pb=boyb;
//繍boyb嶄議方象補竃欺?塋焼?
for(i=0; i<N; i++,pb++){
printf("%s %d %d %f\n", pb->name, pb->num, pb->age, pb->score);
}
fclose(fp);
return 0;
}
塰佩潤惚?
Input data: Tom 2 15 90.5?L Hua 1 14 99?L Tom 2 15 90.500000 Hua 1 14 99.000000嬉蝕 D:\\demo.txt?窟孖猟周議坪否頁辛參堋響議?鯉塀掲械賠漣。喘 fprintf() 才 fscanf() 痕方響亟塘崔猟周、晩崗猟周氏掲械圭宴?音徽殻會嬬校紛艶?喘薩匆辛參心峡?辛參返強俐個。
泌惚繍 fp 譜崔葎 stdin?椎担 fscanf() 痕方繍氏貫囚徒響函方象?嚥 scanf 議恬喘屢揖?譜崔葎 stdout?椎担 fprintf() 痕方繍氏??塋焼烘箜歧敞檻s? printf 議恬喘屢揖。箭泌?
#include<stdio.h>
int main(){
int a, b, sum;
fprintf(stdout, "Input two numbers: ");
fscanf(stdin, "%d %d", &a, &b);
sum = a + b;
fprintf(stdout, "sum=%d\n", sum);
return 0;
}
塰佩潤惚?Input two numbers: 10 20?L
sum=30
<貧匯准
和匯准>