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C语言库realloc()函数
#include <stdio.h> #include <stdlib.h> #include <string.h> int main () { char *str; /* Initial memory allocation */
C语言库abort()函数
#include <stdio.h> #include <stdlib.h> int main () { FILE *fp; printf("Going to open nofile.txt\\n");
C语言库atexit()函数
#include <stdio.h> #include <stdlib.h> void functionA () { printf("This is functionA\\n");
C语言库exit()函数
// --------------------------------------- #include <stdio.h> #include <stdlib.h> int main () {
C语言库getenv()函数
// ------------------------------- #include <stdio.h> #include <stdlib.h> int main () { printf("PATH : %s\\n", getenv("PATH"));
C语言库bsearch()函数
#include <stdio.h> #include <stdlib.h> int cmpfunc(const void * a, const void * b) { return ( *(int*)a - *(int*)b );
C语言库qsort()函数
#include <stdio.h> #include <stdlib.h> int values[] = { 88, 56, 100, 2, 25 }; int cmpfunc (const void * a, const void * b) {
C语言库abs()函数
#include <stdio.h> #include <stdlib.h> int main () { int a, b; a = abs(5); printf("value of a = %d\\n", a);
C语言库div()函数
#include <stdio.h> #include <stdlib.h> int main () { div_t output; output = div(27, 4); printf("Quotient part of (27/ 4) = %d\\n", output.quot);
C语言库puts()函数
#include <stdio.h> #include <string.h> int main () { char str1[15]; char str2[15]; strcpy(str1, "yiibai");
C语言库perror()函数
#include <stdio.h> int main () { FILE *fp; /* first rename if there is any file */ rename("file.txt", "newfile.txt");
C语言库fmod()函数
#include <stdio.h> #include <math.h> int main () { float a, b; int c; a = 9.2; b = 3.7; c = 2; printf("Remainder of %f / %d is %lf\\n", a, c, fmod(a,c));
C语言库atof()函数
#include <stdio.h> #include <stdlib.h> #include <string.h> int main () { float val; char str[20];
C语言库atoi()函数
#include <stdio.h> #include <stdlib.h> #include <string.h> int main () { int val; char str[20];
C语言库strcpy()函数
#include <stdio.h> #include <string.h> int main () { char src[40]; char dest[100]; memset(dest, '\\0', sizeof(dest));
C语言库memcmp()函数
#include <stdio.h> #include <string.h> int main () { char str1[15]; char str2[15]; int ret; memcpy(str1, "abcdef", 6);