51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int main(int argc, char** argv) {
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int fd, rows, cols, i, j;
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int** m;
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if(argc <= 1) {
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fprintf(stderr, "No input file specified");
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exit(1);
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}
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fd = open(argv[1], O_RDONLY);
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if(fd == -1) {
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perror("Failed to open input file");
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exit(1);
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}
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if(read(fd, &rows, sizeof(int)) <= 0) {
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perror("Could not read the number of rows");
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exit(1);
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}
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if(read(fd, &cols, sizeof(int)) <= 0) {
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perror("Could not read the number of columns");
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exit(1);
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}
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m = (int**)malloc(sizeof(int*)*rows);
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for(i=0; i<rows; i++) {
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m[i] = (int*)malloc(sizeof(int)*cols);
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read(fd, m[i], sizeof(int)*cols);
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for(j=0; j<cols; j++) {
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printf("%2d" , m[i][j]);
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}
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printf("\n");
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}
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for(i=0;i<rows;i++){
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free(m[i]);
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}
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free(m);
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close(fd);
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return 0;
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}
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