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https://ittimepass.wordpress.com/2016/11/17/71write-a-program-in-c-to-input-roll-no-and-marks-of-three-subject-of-10-student-print-roll-no-of-only-those-student-who-secured-35-or-more-marks-in-every-subject-separately-name-of-input-file-i/
71) Write a program in C++ to input roll no and marks of three subject of 10 student. Print roll no of only those student who secured 35 or more marks in every subject separately. Name of input file is marks.txt?