fscanf(infile,"%f",&(x[j][i]));什么意思还有fscanf(infile,

fscanf(infile,"%f",&(x[j][i]));什么意思
还有fscanf(infile,

scanf("%f",&x[i][j]) ; // 认识不?他是重【键盘】读入一个浮点数.
scanf(infile,"%f",&x[i][j]) ;// 和它相似,只是从【文件】读入一个浮点数.
fscanf(infile,"\n"); // 貌似不能这么用的吧?