ADD to the below another scan format to parse that reads: Input lines: 1. addu $

Question

ADD to the below another scan format to parse that reads:

Input lines:

1. addu $v0, $zero, $s10 ( with spaces between the source codes)

2. J L1   

/*

*

* For detailed info regarding fgets, refer manpage at linprog

* % man 3 fgets

*

*/

#include <stdio.h>

#define MAXLINE 80

#define MAXREG 5

int main()

{

char line[MAXLINE]={0};

char oper[MAXLINE];

char rd[MAXREG],rs[MAXREG],rt[MAXREG];

while (fgets(line, MAXLINE, stdin)) {

/* check if a 3-address R format instruction */

if (sscanf(line, "%s $%[^,],$%[^,],$%s", oper, rd, rs, rt) == 4) {

printf("input line: %s ", line);

printf("parsed line: op:%10s rd:%5s rs:%5s rt:%5s ",

   oper, rd, rs, rt);

}

/* you need to add other patterns for R,I,and J encoding */

else {

printf("input line: %s ", line);

printf("you need to add sscanf format ");

}

}

return 0;

}

Explanation / Answer

The code was developed

#include <stdio.h>

#define MAXLINE 80
#define MAXREG 5

int main()
{
char line[MAXLINE]={0};
char oper[MAXLINE];
char rd[MAXREG],rs[MAXREG],rt[MAXREG];

while (fgets(line, MAXLINE, stdin)) {
/* check if a 3-address R format instruction */
if (sscanf(line, "%s $%[^,],$%[^,],$%s", oper, rd, rs, rt) == 4) {
printf("input line: %s ", line);
printf("parsed line: op:%10s rd:%5s rs:%5s rt:%5s ",
oper, rd, rs, rt);
}
/* you need to add other patterns for R,I,and J encoding */
else {
printf("input line: %s ", line);
printf("you need to add sscanf format ");
}
}
return 0;
}

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