Lecture27-Homework-fscanf(1).pdf - COMP.1010 Homework-­‐ fscanf Sp19-­‐ Dr Lin Due date 04-­‐05-­‐2019(F in class Name Section 10am 11am

Lecture27-Homework-fscanf(1).pdf - COMP.1010 Homework-­‐...

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Unformatted text preview: COMP.1010 Homework -­‐ fscanf Sp19 -­‐ Dr. Lin Due date: 04-­‐05-­‐2019 (F), in class Name: ________________________________ Section: _________ 10am _______ 11am __________ For (a) ~ (d), what will be (1) the return value of function fscanf and (2) the value for the variable data1 (and data2) after we call the fscanf function? Don’t be confused with those values. They’re different. For each question, let’s assume that a text file is just opened successfully. The box represents the text file and its content. Suggestion: Write a short program to test your answers. FILE *fp = fopen(“myfile.txt”, “r”); int data1, data2; (a) fscanf(fp, “%d”, &data1); -­‐123 23 c (b) fscanf(fp, “%d%d”, &data1, &data2); -­‐123 23 c (c) fscanf(fp, “%d%d”, &data1, &data2); -­‐123 23 (c) fscanf(fp, “%d”, &data1); a 125 (d) fscanf(fp, “%d”, &data1); (an empty file. Hint: think what is in an empty file.) ...
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