sum_program.c

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
	
uint16_t program[] = {
    /*mem[0x3000]=*/    0xF026,    //  1111 0000 0010 0110             TRAP trp_in_u16  ;read an uint16_t from stdin and put it in R0
    /*mem[0x3002]=*/    0x1220,    //  0001 0010 0010 0000             ADD R1,R0,x0     ;add contents of R0 to R1
    /*mem[0x3003]=*/    0xF026,    //  1111 0000 0010 0110             TRAP trp_in_u16  ;read an uint16_t from stdin and put it in R0
    /*mem[0x3004]=*/    0x1240,    //  0001 0010 0010 0000             ADD R1,R1,R0     ;add contents of R0 to R1
    /*mem[0x3006]=*/    0x1060,    //  0001 0000 0110 0000             ADD R0,R1,x0     ;add contents of R1 to R0
    /*mem[0x3007]=*/    0xF027,    //  1111 0000 0010 0111             TRAP trp_out_u16;show the contents of R0 to stdout
    /*mem[0x3006]=*/    0xF025,    //  1111 0000 0010 0101             HALT             ;halt
};

int main(int argc, char** argv) {
    char *outf = "sum.obj";
    FILE *f = fopen(outf, "wb");
    if (NULL==f) {
        fprintf(stderr, "Cannot write to file %s\n", outf);
    }
    size_t writ = fwrite(program, sizeof(uint16_t), sizeof(program), f);
    fprintf(stdout, "Written size_t=%lu to file %s\n", writ, outf);
    fclose(f);
    return 0;
}