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// Example12.4
//Write a program to illustatre error handling in file operations.
warning('off');
fp1=mopen('TEST','w'); //Open file in write mode,fp1 is file descriptor
for i=10:10:100
//write data to the file
mfprintf(fp1,'%d\n',i);
end
mclose(fp1);
disp("Input file name");
filename='a';
while(filename~=' ')
filename=scanf("%s");
//Error handling
try
fp2=mopen(filename,'r');
if(fp2>0) ,
break; //Terminates the loop if file exist or opened
end
catch
//Messages to be displayed when error occured
printf("Can not open file.\n");
printf("Type file name again.\n");
end
end
//Code below runs while there is no error
for i=1:20
number = mfscanf(fp2,"%d"); //Read data from file 'TEST'
if meof(fp2) then //Test for end of file
printf("Ran out of data");
break;
else
printf("%d\n",number); //prints the data
end
end
mclose(fp2);
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