Class Attendance

Consider the following header file:

myheader.h

1. #ifndef _MYHEADER_H
2. #define _MYHEADER_H 1
3. int foo(char *);
4. #endif /* myheader.h */

Write the function foo() declared in myheader.h that takes a string as a parameter, consisting only of plus ('+') and minus ('-') characters, and describes a student’s attendance in the semester classes: plus signs indicate presence, minus signs indicate absence. The function should determine and return the number of times the student missed class.

Note

Place the function in file foo.c and submit this file as a solution to the evaluation system. You can test your solution using the following files. The evaluation system does not necessarily perform the evaluation using these files.

main.c

1. #include <stdio.h>
2. #include <stdlib.h>
3. #include "myheader.h"
4. int main()
5. {
6.     printf("%d\n", foo("++---+-+--+++-"));
7.     return EXIT_SUCCESS;
8. }

Makefile

1. SRCS = main.c foo.c
2. OBJS = $(SRCS:%.c=%.o)
3. TARGETS = main
4. .PHONY: clean
5. all: $(TARGETS)
6. main: $(OBJS)
7. $(CC) $(OBJS) -o main
8. %.o: %.c
9. $(CC) -Wall -c $< -o $@
10. clean:
11. rm -rf $(OBJS) *~ $(TARGETS)

Output for Sample Input

1. 7

One possible solution is available in: main.c.