C/C++中fscanf和fprintf的用法

Question

修改txt文档的代码中这个jpg的作用是啥呀，txt文档内容如下

int main()
{
FILE *fp = fopen("a.txt","r");
char jpg[20]; float data[5];
fscanf(fp,"%s %f %f %f %f %f",jpg,&data[0],&data[1],&data[2],&data[3],&data[4]);
fclose(fp);
for(int i=0;i<5;i++)
   data[i] += 1;
fp = fopen("a.txt","w");
fprintf(fp,“%s %f %f %f %f %f",jpg,data[0],data[1],data[2],data[3],data[4]);     
fclose(fp);
}

Answer 1

当字符串用呀，它就是个字符串，你用%s做提取，就这么个意思吧